complication vs step forward

complication

noun
  • A person who doesn't fit in with the main scheme of things; an interloper. 

  • The state of being complicated; intricate or confused relation of parts; complexity. 

  • The act or process of complicating. 

  • A feature beyond basic time display in a timepiece. 

  • A disease or diseases, or adventitious circumstances or conditions, coexistent with and modifying a primary disease, but not necessarily connected with it. 

step forward

verb
  • to volunteer for something; to offer one's services 

  • to take one or more steps forward, especially in response to a request for identification 

  • to admit one's wrongdoing, to own up 

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