The document discusses different types of collocations, including grammatical collocations, lexical collocations, strong collocations, weak collocations, medium strength collocations, and unique collocations. Grammatical collocations involve a noun, verb, or adjective plus a preposition or verb form. Lexical collocations predictably connect a verb, noun, adjective, or adverb with another word. Strong collocations have words that are highly attached and occur together frequently, while weak collocations have freely substitutable words. Medium strength collocations occur together more often than other combinations. Unique collocations involve words that are singular in how they co-occur.