either vs particularly

either

adv
  • As well. 

pron
  • One or the other of two people or things. 

det
  • Any one (of two). 

  • Each of two; both. 

conj
  • Introduces the first of two (or occasionally more) options or possibilities, the second (or last) of which is introduced by “or”. 

particularly

adv
  • To a great extent. 

  • In detail; with regard to particulars. 

  • Especially, extremely. 

  • Specifically, uniquely or individually. 

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