particular vs theirs

particular

adj
  • Specialised; characteristic of a specific person or thing. 

  • Of a person, concerned with, or attentive to, details; fastidious. 

  • Containing a part only; limited. 

  • Distinguished in some way; special (often in negative constructions). 

  • Holding a particular estate. 

  • Concerned with, or attentive to, details; minute; circumstantial; precise. 

  • Forming a part of a genus; relatively limited in extension; affirmed or denied of a part of a subject. 

  • Specific; discrete; concrete. 

noun
  • A small individual part of something larger; a detail, a point. 

  • A particular case; an individual thing as opposed to a whole class. (Opposed to generals, universals.) 

theirs

pron
  • That which belongs to them; the possessive case of they, used without a following noun. 

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