reference vs toss up

reference

verb
  • To refer to, to use as a reference. 

  • To provide a list of references for (a text). 

  • To mention, to cite. 

  • To contain the value that is a memory address of some value stored in memory. 

noun
  • A measurement one can compare (some other measurement) to. 

  • Information about a person, provided by someone (a referee) with whom they are well acquainted. 

  • The act of referring: a submitting for information or decision. 

  • A previously published written work thus indicated; a source. 

  • A special sequence used to represent complex characters in markup languages, such as ™ for the ™ symbol. 

  • A relation between objects in which one object designates, or acts as a means by which to connect to or link to, another object. 

  • An object containing information which refers to data stored elsewhere, as opposed to containing the data itself. 

  • A person who provides this information; a referee. 

  • A short written identification of a previously published work which is used as a source for a text. 

  • A reference work. 

toss up

verb
  • To casually mention as an idea. 

  • To produce, generate. 

  • To vomit. 

  • To beat up, thrash. 

  • To make a decision based on chance, for example by flipping a coin or rolling a dice. 

  • To cook something quickly. 

  • To throw something upwards. 

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