replace vs step into the breach

replace

verb
  • To take the place of; to be used instead of 

  • To place again. 

  • To put in a new or different place. 

  • To take over the position or role from. 

  • To restore to a former place, position, condition, etc.; to put back 

  • To refund; to repay; to pay back 

  • To supply or substitute an equivalent for 

  • To demolish (a building) and build an updated form of that building in its place. 

step into the breach

verb
  • To do a task that one is not ordinarily expected to do because there is no one else to do it. 

How often have the words replace and step into the breach occurred in a corpus of books? (source: Google Ngram Viewer )