Man pages matching name curvescreenshots in section 3:

curvescreenshots.3.en	debian 10 / libqwt-doc
curvescreenshots.3.en	debian 10 / libqwt5-doc
curvescreenshots.3.en	debian 11 / libqwt-doc
curvescreenshots.3.en	debian 12 / libqwt-doc