What is a corpus? A corpus is a large collection of English texts - literally millions of words - that statistically compares how a language is used. Corpora (the plural of corpus) are used to find out which words go together. These words are known as collocations. These are great tools for language teachers, but can admittedly be a bit much for English learners. An alternate to using corpora is using the automatic suggestions made by Google for learning words that go together. While these results are not always the most common phrases, they often reflect the typical phrases that are used in searches by native speakers. These phrases are referred to as chunks, and learning language through chunking is a great way to improve fluency.