outstripping vs overpowering

outstripping

noun

  • The act or process of something being outstripped. 

overpowering

noun

  • The process of something being overpowered. 

adj

  • That overpowers; so strong as to be overwhelming. 

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