Getting a task by month using tracker

What I’m trying to do

Hello everyone!
I want to get a graph of the total number of tasks that are tagged [[Month:: ]]. I have such tasks in different notes, and often these notes are not named as a date.

Things I have tried

I found a way to make the X-axis divided by months, it is visible in the code. However, in this case I cannot get the number of tasks.
If I use task, I get this: No valid Y value found in notes

If I use text, as in the example, I get the number of files that contain text with the required tag, but I want to get the number of tasks.
Is there a way to do this?

searchType: fileMeta, text
searchTarget: cDate, “Месяц::”
xDataset: 0
dateFormat: MMMM
folder: /
line:
fillGap: true
xAxisTickLabelFormat: MMMM