YOU SAID:

Challenge seconds spent

INTO JAPANESE

挑戦秒を費やした

BACK INTO ENGLISH

I spent a challenging second

INTO JAPANESE

私は挑戦的な秒を過ごした

BACK INTO ENGLISH

I had a challenging second

INTO JAPANESE

私は挑戦していた

BACK INTO ENGLISH

I was challenging

INTO JAPANESE

私は挑戦していた

BACK INTO ENGLISH

I was challenging