hatching vs roe

hatching

noun
  • The act of an egg hatching, eclosion 

  • A group of birds, reptiles, fish, insects, etc., which emerge from their eggs at the same time. 

  • A method of shading areas of a drawing or diagram with fine parallel lines. 

  • Patterns used in construction drawings to represent various materials. 

roe

noun
  • The eggs of fish. 

  • The sperm of certain fish. 

  • The ovaries of certain crustaceans. 

  • A mottled appearance of light and shade in wood, especially in mahogany. 

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