assort vs systematize

assort

verb
  • To sort or arrange according to characteristic or class. 

  • To furnish with, or make up of, various sorts or a variety of goods. 

  • To be associated with; to consort with. 

  • To be of a kind with, to harmonise or match. 

systematize

verb
  • To arrange into a systematic order; to make systematic; to organise as a system 

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