Patterns of collocation
It is not, however, only the simple frequency and range of single items that is revealed in the corpus analysis of text but also, more interestingly and significantly, the frequency and range of their patterns of co-occurrence with other items.
there are also other connections across linguistic items, certain patterns of co-occurrence, which recur quite regularly as a property of texts in general. Thus certain items tend to keep company, or collocate, with others: there is, as it were, a kind of mutual attraction that draws them together.
formulate phrase--- A frequently recurring collocation of relatively fixed sequence and form. Some such phrases are completely fixed, e.g. by fair means or foul, Be that as it may, while others allow for varying degree of flexibility.
concordance (词汇索引)---the display of the different co-texts of occurrence of particular words, typically the result of the computer analysis of a corpus.
Corpus---A collection, often on a very large scale, of actually occurring textual data, electronically stored and analysable by computer program.
Concordance for words which are semantically related can be compared and their collocational differences identified.
So, in reference to Hymes, what is actually performed relates to what is feasible. The use of recurring patterns of language, stored ready for use in the mind, is in this case motivated by the co-operative principle.
To deliberately disregard them would be to violate the manner maxim.

