dictate vs partial ordering relation

dictate

noun
  • An order or command. 

verb
  • To determine or decisively affect. 

  • To order, command, control. 

  • To speak in order for someone to write down the words. 

partial ordering relation

noun
  • A partial order. 

How often have the words dictate and partial ordering relation occurred in a corpus of books? (source: Google Ngram Viewer )