anteroom vs thalamus

anteroom

noun
  • A room before, or forming an entrance to, another; a waiting room. 

thalamus

noun
  • An inner room or nuptial chamber. 

  • The receptacle of a flower; a torus. 

  • A thallus. 

  • Either of two large, ovoid structures of grey matter within the forebrain that relay sensory impulses to the cerebral cortex. 

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