colleague vs running dog

colleague

noun
  • A fellow member of a profession, staff, academic faculty or other organization; an associate. 

verb
  • To unite or associate with another or with others. 

running dog

noun
  • A lackey; a lapdog; an unprincipled person who helps or flatters other, more powerful and often evil people. 

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