random variable vs variant

random variable

noun
  • A measurable function from a sample space to the measurable space of possible values of the variable. 

  • A quantity whose value is random and to which a probability distribution is assigned, such as the possible outcome of a roll of a dice. 

variant

noun
  • A variable that can hold any of various unrelated data types. 

  • Something that is slightly different from a type or norm. 

  • A different sequence of a gene (locus). 

  • One of a set of words or other linguistic forms that conveys the same meaning or serves the same function. 

adj
  • Showing deviation or disagreement. 

  • Showing variety, diverse. 

  • Covariant and/or contravariant. 

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