overstep vs take law into own hands

overstep

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. 

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

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

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

take law into own hands

How often have the words overstep and take law into own hands occurred in a corpus of books? (source: Google Ngram Viewer )