custard vs pudding

custard

noun
  • A type of sauce made from milk and eggs (and usually sugar, and sometimes vanilla or other flavourings) and thickened by heat, served hot poured over desserts, as a filling for some pies and cakes, or cold and solidified; also used as a base for some savoury dishes, such as quiches, or eaten as a stand-alone dessert; egg custard. 

  • A similar sauce made from milk and cornflour or custard powder (and usually sugar, and sometimes vanilla or other flavourings) and thickened by heat. 

pudding

noun
  • A type of dessert that has a texture similar to custard or mousse but using some kind of starch as the thickening agent. 

  • Dessert; the dessert course of a meal. 

  • Entrails. 

  • A sausage made primarily from blood. 

  • Any of various dishes, sweet or savoury, prepared by boiling or steaming, or from batter. 

  • A type of cake or dessert cooked usually by boiling or steaming. 

  • An overweight person. 

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