collocate vs regiment

collocate

verb
  • To arrange or occur side by side. 

  • (said of certain words) To be often used together, form a collocation; for example strong collocates with tea. 

noun
  • A component word of a collocation; a word that collocates with another. 

regiment

verb
  • To systematize, or put in rigid order. 

  • To form soldiers into a regiment. 

noun
  • A unit of armed troops under the command of an officer, and consisting of several smaller units; now specifically, usually composed of two or more battalions. 

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