logical process vs modus

logical process

modus

noun
  • A fixed compensation or equivalent given instead of payment of tithes in kind, expressed in full by the phrase modus decimandi. 

  • A qualification involving the idea of variation or departure from some general rule or form, in the way of either restriction or enlargement, according to the circumstances of the case, as in the will of a donor, an agreement between parties, etc. 

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