Which one is wrong? Which one is used more by a native speaker?
1. I go to my grandmother's house all Saturdays.
2. I go to my grandmother's house on all Saturdays.
3. I go to my grandmother's house every Saturday.
4. I always go to my grandmother's house on Saturday.

Question

Answer

correct sentences are 3 and 4

Answer

Wrong:  I go to my grandmother's house all Saturdays.
Wrong : I go to my grandmother's house on all Saturdays.
Right:  I go to my grandmother's house every Saturday.
Right : I always go to my grandmother's house on Saturday.