This is the 57th most frequent Russian word.
раз
"Раз" means "time" (as in an instance or occurrence) or "once."
Time occurrence (first time).
Первый раз я поехал за границу, когда мне было двадцать.
The first time I traveled abroad, I was twenty.
Multiplicative comparison (ten times).
Эта задача требует в десять раз больше усилий, чем я ожидал.
This task requires ten times more effort than I expected.
Finality or completeness (once and for all).