hollow vs shallow

hollow

verb
  • to make a hole in something; to excavate 

  • To call or urge by shouting; to hollo. 

adv
  • Completely, as part of the phrase beat hollow or beat all hollow. 

adj
  • Concave; gaunt; sunken. 

  • Insincere, devoid of validity; specious. 

  • Distant, eerie; echoing, reverberating, as if in a hollow space; dull, muffled; often low-pitched. 

  • Without substance; having no real or significant worth; meaningless. 

  • Pertaining to hollow body position 

  • Having an empty space or cavity inside. 

noun
  • A sunken area or unfilled space in something solid; a cavity, natural or artificial. 

  • A sunken area. 

  • A small valley between mountains. 

  • A feeling of emptiness. 

shallow

verb
  • To make or become less deep. 

noun
  • A costermonger's barrow. 

  • A shallow portion of an otherwise deep body of water. 

  • A fish, the rudd. 

adj
  • Not steep; close to horizontal. 

  • Not far forward, close to the net. 

  • Having little depth; significantly less deep than wide. 

  • Not intellectually deep; not penetrating deeply; simple; not wise or knowing. 

  • Concerned mainly with superficial matters. 

  • Extending not far downward. 

  • Lacking interest or substance. 

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