The text provides a chart of 50 entries for verbal-noun patterns of simple triliteral roots. The chart is a repertoire of attested forms, not a license to impose one pattern on every verb.
Verbal nounPatternMeaning
قَتْلٌفَعْلٌKilling
فِسْقٌفِعْلٌDisobedience
شُكْرٌفُعْلٌGratitude
رَحْمَةٌفَعْلَةٌMercy
First establish the attested maṣdar, then analyze original and additional radicals and identify its pattern. قَتْلٌ and شُكْرٌ are both verbal nouns but not the same weight.