Man pages matching name data::downsample::largesttrianglethreebuckets in section 3pm:

Data::DownSample::LargestTriangleThreeBuckets.3pm.en	debian 11 / libdata-downsample-largesttrianglethreebuckets-perl
Data::DownSample::LargestTriangleThreeBuckets.3pm.en	debian 12 / libdata-downsample-largesttrianglethreebuckets-perl
Data::DownSample::LargestTriangleThreeBuckets.3pm.en	debian 13 / libdata-downsample-largesttrianglethreebuckets-perl