1 Nephi 20:4

And I did it because I knew that thou art obstinate,

and thy neck is an iron sinew, and thy brow brass;

and thy neck is an iron sinew, and thy brow brass;

and - 93 occurrences in 42 verses

and thy - 6 occurrences in 5 verses - 1 Nephi 20:4, 18,   21:19, 22, 26