overload vs underwhelm

overload

noun
  • An excessive load. 

  • An overloaded version of a function. 

  • The damage done, or the outage caused, by such a load. 

  • An load of goods above the prescribed carrying weight of the vehicle. 

verb
  • To create different functions for the same name, to be used in different contexts. 

  • To load excessively. 

  • To provide too much power to a circuit. 

  • To fail due to excessive load. 

underwhelm

verb
  • To fail to impress; to perform disappointingly. 

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