Rashi on Genesis 31:7/רש"י על בראשית ל״א:ז׳

1עשרת מנים TEN TIMES — The word מנים never means less than ten (Ruth 4:11).

2מנים signifies sum — the total of enumeration — these are tens: we may infer, therefore, that he changed the conditions of his hire one hundred times (Genesis Rabbah 74:3).