talk over vs talk through

talk over

verb
  • To persuade (someone); to talk around. 

  • To discuss; to converse about a matter or issue. 

  • To verbally interrupt (someone); to speak at the same time as someone else. 

talk through

verb
  • To tell someone step by step how to do something. 

  • To comfort someone as they endure trauma; to help someone consider an issue or see certain aspects of it. 

How often have the words talk over and talk through occurred in a corpus of books? (source: Google Ngram Viewer )