Here are the Passages within the text of the Book of Mormon where the word 'horse' and the word 'horses' are mentioned:
1 Nephi 18:25:
[25] And it came to pass that we did find upon the land of promise, as we journeyed in the wilderness, that there were beasts in the forests of every kind, both the cow and the ox, and the ass and the horse, and the goat and the wild goat, and all manner of wild animals, which were for the use of men. And we did find all manner of ore, both of gold, and of silver, and of copper.
(About 590 and 589 B.C.E.)
Enos 1:21:
[21] And it came to pass that the people of Nephi did till the land, and raise all manner of grain, and of fruit, and flocks of herds, and flocks of all manner of cattle of every kind, and goats, and wild goats, and also many horses.
(About Between 544 and 420 B.C.E.)
Alma 18:9-10 & 12:
[9] And they said unto him: Behold, he is feeding thy horses. Now the king had commanded his servants, previous to the time of the watering of their flocks, that they should prepare his horses and chariots, and conduct him forth to the land of Nephi; for there had been a great feast appointed at the land of Nephi, by the father of Lamoni, who was king over all the land.
[10] Now when king Lamoni heard that Ammon was preparing his horses and his chariots he was more astonished, because of the faithfulness of Ammon, saying: Surely there has not been any servant among all my servants that has been so faithful as this man; for even he doth remember all my commandments to execute them.
...
[12] And it came to pass that when Ammon had made ready the horses and the chariots for the king and his servants, he went in unto the king, and he saw that the countenance of the king was changed; therefore he was about to return out of his presence.
(About 91 and 90 B.C.E.)
Alma 20:6:
[6] Now when Lamoni had heard this he caused that his servants should make ready his horses and his chariots.
(About 91 and 90 B.C.E.)
3 Nephi 3:22:
[22] And it came to pass in the seventeenth year, in the latter end of the year, the proclamation of Lachoneus had gone forth throughout all the face of the land, and they had taken their horses, and their chariots, and their cattle, and all their flocks, and their herds, and their grain, and all their substance, and did march forth by thousands and by tens of thousands, until they had all gone forth to the place which had been appointed that they should gather themselves together, to defend themselves against their enemies.
(About A.D. 15 and 16)
3 Nephi 4:4:
[4] Therefore, there was no chance for the robbers to plunder and to obtain food, save it were to come up in open battle against the Nephites; and the Nephites being in one body, and having so great a number, and having reserved for themselves provisions, and horses and cattle, and flocks of every kind, that they might subsist for the space of seven years, in the which time they did hope to destroy the robbers from off the face of the land; and thus the eighteenth year did pass away.
(About Between A.D. 17 20)
3 Nephi 6:1:
[1] And now it came to pass that the people of the Nephites did all return to their own lands in the twenty and sixth year, every man, with his family, his flocks and his herds, his horses and his cattle, and all things whatsoever did belong unto them.
(About Between A.D. 25 and 28)
3 Nephi 21:14: (Jesus Speaking):
[14] Yea, wo be unto the Gentiles except they repent; for it shall come to pass in that day, saith the Father, that I will cut off thy horses out of the midst of thee, and I will destroy thy chariots;
(About A.D. 33 and 34)
Ether 9:19:
[19] And they also had horses, and asses, and there were elephants and cureloms and cumoms; all of which were useful unto man, and more especially the elephants and cureloms and cumoms.
(Sometime Between 2,200 and 1,200 B.C.E.)
The Sngular word ‘horse’ is just mentioned one time within the text of the Book of Mormon. The Plural word ‘horses’ is mentioned 11 times within the text of the Book of Mormon. (I Excluding the Isaiah Passages within the Book of Mormon.) "And I've said it before, you want to know what Joseph Smith looked like in Nauvoo, just look at Trump." - Fence Sitter
