piece of piss vs walkover

piece of piss

noun
  • Something easy to achieve. 

walkover

noun
  • Someone easy to defeat. 

  • An easy victory; a walkaway. 

  • An ecological survey carried out by walking across and examining a piece of land. 

  • A bye or victory awarded to a competitor when a scheduled opponent fails to play a game. 

  • Someone who does not stand up for themself when mistreated; a doormat 

  • A horse race with only one entrant. 

  • A backbend combined with a handstand. 

  • A type of railroad passenger car seat, having reversible seat backs that can be moved across the seat to face either direction of travel 

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