y. “Collocation falls into two main syntactic groups. They may be either grammatical collocations or lexical collocations. Grammatical collocations are those in which a noun, verb, or adjective frequently co-occurs with a grammatical item, usually a preposition. Examples are reason for, account for, in retrospect. Lexical collocations differ in that they do not contain grammatical words, but consist of combination of full lexical items, i.e., nouns, verbs, adjectives and adverbs. They include combinations ..