rekindle vs relaunch

rekindle

verb

  • To kindle again. 

  • To revive. 

  • To be kindled or ignited again. 

relaunch

verb

  • To launch again. 

noun

  • The act or fact of launching again. 

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