garb vs gnomon

garb

noun
  • A measure of arrows in the Middle Ages. 

  • A type of dress or clothing. 

  • A guise, external appearance. 

  • Fashion, style of dressing oneself up. 

  • A wheat sheaf. 

verb
  • To dress in garb. 

gnomon

noun
  • The index of the hour circle of a globe. 

  • A plane figure formed by removing a parallelogram from a corner of a larger parallelogram. 

  • An object such as a pillar or a rod that is used to tell time by the shadow it casts when the sun shines on it, especially the pointer on a sundial. 

  • An object such as a pillar used by an observer to calculate the meridian altitude of the sun (that is, the altitude of the sun when it reaches the observer's meridian), for the purpose of determining the observer's latitude. 

  • A number representing the increment between two figurate numbers (“numbers equal to the numbers of dots in geometric figures formed of dots”). 

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