YOU SAID:

I have been attacked 500 times

INTO JAPANESE

私は500回攻撃されました

BACK INTO ENGLISH

I was attacked 500 times

INTO JAPANESE

500回攻撃されました

BACK INTO ENGLISH

Attacked 500 times

INTO JAPANESE

500回攻撃

BACK INTO ENGLISH

500 attacks

INTO JAPANESE

500回の攻撃

BACK INTO ENGLISH

500 attacks