functional linguistics vs functionalism

functional linguistics

noun
  • An approach to the study of language characterized by systematically taking into account the speaker's and the hearer's sides, and the communicative needs of the speaker and of the given language community. 

functionalism

noun
  • A general school of thought that considers psychological phenomena in terms of their role in adaptation to the person's environment. 

  • A doctrine, in several fields, that the function of something should be reflected in its design and the materials used in its construction. 

  • Synonym of functional linguistics 

  • The idea that social and cultural cohesion are a function of the interdependence and interactions of the institutions of a society. 

  • The definition of mental states in terms of their causes and effects. 

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