Man pages matching name pmparseinterval in section 3:

pmParseInterval.3.en	debian 10 / libpcp3-dev
pmparseinterval.3.en	debian 10 / libpcp3-dev
pmParseInterval.3.en	debian 11 / libpcp3-dev
pmParseInterval.3.en	debian 12 / libpcp3-dev