mandarin orange vs sour

mandarin orange

noun
  • A small citrus tree (Citrus reticulata) with fruit resembling the orange. 

  • The fruit of this tree, smaller than an orange and oblate. In daily usage, it may include other similar citrus fruits like Citrus unshiu (satsuma or mikan) Citrus tangerina (tangerine). 

sour

noun
  • Any cocktail containing lemon or lime juice. 

  • A drink made with whiskey, lemon or lime juice and sugar. 

  • The acidic solution used in souring fabric. 

  • A sour or acid substance; whatever produces a painful effect. 

  • The sensation of a sour taste. 

adj
  • Having an acidic, sharp or tangy taste. 

  • Unfortunate or unfavorable. 

  • Peevish or bad-tempered. 

  • Off-pitch, out of tune. 

  • Made rancid by fermentation, etc. 

  • Excessively acidic and thus infertile. 

  • Tasting or smelling rancid. 

  • Containing excess sulfur. 

verb
  • To make sour. 

  • To become sour. 

  • To spoil or mar; to make disenchanted. 

  • To become disenchanted. 

  • To make (soil) cold and unproductive. 

  • To macerate (lime) and render it fit for plaster or mortar. 

  • To process (fabric) after bleaching, using hydrochloric acid or sulphuric acid to wash out the lime. 

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