For the monthly view, it should probably truncate the ending date so as to not show a partial month number. February just started so it makes every search term look like it is plunging.
Yeah it's annoying, I think I'll add a toggle "Display data for incomplete period" or similar so the user can switch between views (for something like "coronavirus" the data from the first few days of the month exceeds that from the previous full month so I don't want to discard it entirely).
