follow in footsteps vs replicate

follow in footsteps

replicate

verb
  • To repeat (an experiment or trial) with a consistent result. 

  • To make a copy (replica) of. 

adj
  • Folded over or backward; folded back upon itself. 

noun
  • A tone that is one or more octaves away from a given tone. 

  • The outcome of a replication procedure; an exact copy or replica. 

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