recursion vs relaunch

recursion

noun

  • The act of recurring. 

  • The act of defining an object (usually a function) in terms of that object itself. 

  • The invocation of a procedure from within itself. 

relaunch

noun

  • The act or fact of launching again. 

verb

  • To launch again. 

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