arse-kisser vs suck up

arse-kisser

noun
  • A sycophant. 

suck up

verb
  • To absorb (fluid). 

  • To fellate (a person) 

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

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