does a TN visa have a min# of days you MUST work in the US?

Question: For a TN visa, IS there a specified number of days you HAVE to work inside the US within the 364 days of your specified working range?

For instance if I'm traveling back and forth occasionally but not all the time. My primary residence would be in Canada.

I was told there might be a stipulation on that in the fine print.
thanks

No. I've done plenty of TNs where the applicant was in the U.S. for one day out of the entire year.