millions of years ago
million of year ago
n prep n post
millions of years ago .
m ɪ l i ə n z WORD_BOUNDARY ʌ v WORD_BOUNDARY j ɪ ɹ z WORD_BOUNDARY ɐ ɡ oʊ WORD_BOUNDARY
m i l l i o n s WORD_BOUNDARY o f WORD_BOUNDARY y e a r s WORD_BOUNDARY a g o WORD_BOUNDARY