suck up vs white knight

suck up

verb
  • To adulate or flatter somebody excessively, generally to obtain some personal benefit or favour. 

  • To absorb (fluid). 

  • To fellate (a person) 

white knight

verb
  • To unnecessarily defend someone, especially in an attempt to gain favour. 

noun
  • An individual or corporation that intends to acquire another company in order to avert a hostile takeover. 

  • Someone who unnecessarily defends someone else. 

  • A man who defends a woman in debate etc. in an attempt to gain her favour. 

  • A mushroom of species Tricholoma album. 

  • A hero, savior, or righteous individual. 

How often have the words suck up and white knight occurred in a corpus of books? (source: Google Ngram Viewer )