Thank you for the ideas below. That did work. I thought I had tried
"10 mins" before, but maybe I used just 10 min.
===============
Yes, you can have date_breaks = "n mins" where n is any integer.
date_breaks = "15 mins"
date_breaks = "30 mins"
date_breaks = "1 hour" # or "1 hours", plural
The only way I know is to try different values until you find one suitable.
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