Man pages matching name qwtroundscaledraw in section 3:

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