Rate of cleanings per day is not the same as the duration of each cleaning(s)?

How does this reveal information about the average rate per day?

How often does the bullet train turn about - the article and video both claim this is down at each end of line stop prior to turn about.

What infomation does the longer general video expose about Japans cleaning corp that you can look up to obtain general schedules?

I don't know, hence why I am asking you, the person who posted the links to these videos.