Man pages matching name pmparsetimewindow in section 3:

pmParseTimeWindow.3.en	debian 10 / libpcp3-dev
pmparsetimewindow.3.en	debian 10 / libpcp3-dev
pmParseTimeWindow.3.en	debian 11 / libpcp3-dev
pmParseTimeWindow.3.en	debian 12 / libpcp3-dev