YOU SAID:

They mostly come at night...mostly

INTO JAPANESE

彼らは主に夜来る主

BACK INTO ENGLISH

They mostly come at night in the main

INTO JAPANESE

夜に大抵来るメインで

BACK INTO ENGLISH

Come mostly at night in the main

INTO JAPANESE

メインは、たいてい夜

BACK INTO ENGLISH

Usually the main at night

INTO JAPANESE

通常、夜メイン

BACK INTO ENGLISH

Usually the main at night