YOU SAID:

I insisted, three months isn't long enough for it to be known

INTO JAPANESE

私は3ヶ月はそれが知られているのに十分な長さではないと主張しました

BACK INTO ENGLISH

I argued that 3 months is not long enough for it to be known

INTO JAPANESE

私は3ヶ月はそれが知られているのに十分な長さではないと主張しました

BACK INTO ENGLISH

I argued that 3 months is not long enough for it to be known