US Patent 10268676 Automated detection of linguistic uniqueness

A computer implemented method for detecting linguistic uniqueness includes receiving, with an examination evaluation server, a list of word n-grams and corresponding frequency values indicating the frequency at which each word n-gram appears in a language corpus, receiving an examination response with one or more sentences, tokenizing the sentences into a plurality of words or phrases, combining contiguous words or phrases into n-word segments, and identifying, for each n-word segment that matches a matching word n-gram from the list, the frequency value corresponding to the matching word n-gram.