cross the line vs overstep

cross the line

verb
  • To overstep a boundary, rule, or limit; to go too far or do something unacceptable. 

  • To achieve completion of something. 

  • To finish a race. 

  • To cross the equator, as a vessel at sea. 

  • To film from the opposite side of an imaginary axis on set in order to view the actors from the opposite direction. 

overstep

verb
  • To go too far beyond (a limit); especially, to cross boundaries or exceed norms or conventions. 

  • To take a step in which the foot touches ground too far forward. 

  • To move with a gait such that the hind foot touches the ground forward of the point where the front foot touches the ground. 

noun
  • A gait in which the hind foot touches ground in front of where the front foot touches the ground. 

  • A movement in which one oversteps. 

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