For the team challenge (which is optional - remember that you will only get points here when you have at least one bingo pattern finished from your personal card at the end of the challenge), yes, you post one work every week.

For the regular bingo challenge, you can also post single works at every time, but when you have finished your bingo pattern, you need to make a BINGO post with links going to all the works of the pattern to earn points. You can also decide only to make the BINGO post, putting all your single works here.