blind spot vs fissure

blind spot

noun
  • A subject or area about which one is uninformed or misinformed, often because of a prejudice or lack of appreciation. 

  • A location where radio reception and/or transmission is significantly poorer than in surrounding locations. 

  • A location around an earthquake epicentre that is prone to earthquake. 

  • An inability to recognize a fact or think clearly about a certain topic, especially because of a prejudice. 

  • The place where the optic nerve attaches to the retina, and so where the retina cannot detect light. 

  • The part of the railway/tramway track that cannot be seen in the side mirror or the side window. 

  • In driving, the part of the road that cannot be seen in the rear-view mirror. 

  • In a stadium or auditorium, any location affording those seated or standing there only an obstructed visual or auditory experience. 

fissure

noun
  • A state of incompatibility or disagreement. 

  • A long, narrow crack or opening made by breaking or splitting, especially in rock or earth. 

  • A groove, deep furrow, elongated cleft or tear between body parts or in the substance of an organ; a sulcus. 

  • A break or slit in tissue usually at the junction of skin and mucous membrane. 

verb
  • To split, forming fissures. 

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