Man pages matching name pmfreeeventresult in section 3:

pmFreeEventResult.3.en	debian 10 / libpcp3-dev
pmfreeeventresult.3.en	debian 10 / libpcp3-dev
pmFreeEventResult.3.en	debian 11 / libpcp3-dev
pmFreeEventResult.3.en	debian 12 / libpcp3-dev