divisio vs ilk

divisio

noun
  • A category in the classification of organisms, ranking below regnum and above classis. 

ilk

noun
  • A type, race or category; a group of entities that have common characteristics such that they may be grouped together. 

adj
  • Very; same. 

How often have the words divisio and ilk occurred in a corpus of books? (source: Google Ngram Viewer )