I found a difficulty with the custom intervals not carrying out the biweekly queries, a precise day determined until the first month on the 15th, every hour.

But even following the official documentation it was not possible, it a query and does not bring any more value.

Update interval: 0
Custom intervals (Scheduling) md01-15h00-23
Other examples that didn't work:

md01-15h00-23m/10
md01-15h00-23m/59
md01-15m/59
md01-15m/5
md01,15h00-23
md01,15
md1,15
md01,15m/59

Some of the examples collected only once, and did not collect more.

It doesn't show an error message, it doesn't collect just that.