swallow up vs underwhelm

swallow up

verb
  • To completely enclose or envelop. 

  • To voraciously consume resources, such as money; to devour. 

  • To take over or absorb something (especially an organisation) so it no longer has a separate identity; to assimilate. 

underwhelm

verb
  • To fail to impress; to perform disappointingly. 

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