replace vs step into someone's boots

replace

verb
  • To place again. 

  • To put in a new or different place. 

  • To take over the position or role from. 

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

  • 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 someone's boots

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