struggle vs walkover

struggle

noun
  • A contortion of the body in an attempt to escape or to perform a difficult task. 

  • Strife, contention, great effort. 

verb
  • To strive, to labour in difficulty, to fight (for or against), to contend. 

  • To strive, or to make efforts, with a twisting, or with contortions of the body. 

walkover

noun
  • An easy victory; a walkaway. 

  • Someone easy to defeat. 

  • 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 struggle and walkover occurred in a corpus of books? (source: Google Ngram Viewer )