pecorum
pecorum is a Latin form of pecus, meaning “cattle, herd, flock; (pecus, pecudis) a beast, sheep”. It is the genitive plural neuter noun.
Found 63 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.12.3: Hominum est infinita multitudo creberrimaque aedificia fere Gallicis consimilia, pecorum magnus numerus.
All forms of pecus (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.