struggle vs zigzag

struggle

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

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

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

  • Strife, contention, great effort. 

zigzag

verb
  • To move or to twist in a zigzag manner. 

adv
  • in a zigzag manner or pattern 

noun
  • A line or path that proceeds by sharp turns in alternating directions. 

  • One of these sharp turns. 

adj
  • Moving in, or having a zigzag. 

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