Cooccurrence

In general linguistics, cooccurrence refers to the joint use of two lexical units (eg words) in a higher unit, such as a word or document. The assumption is that terms are mutually dependent when their joint use is very common. Statistical tests provide means for supposed dependence, such as variants of the mutual information test or the "likelihood ratio". This may be due to both grammatical and semantic reasons, since cooccurrence itself needs complementary terms such as a semantic field.

When the semantic dependence or grammar of two terms is produced, it is often referred to as placement. Both concepts have great importance in the field of information retrieval. Example of coocurrencias

Locutions are "stable" coocurrences, since it functions as a lexical unit with its own meaning, not derived from the sum of meanings of its components, for example "it rains in pitchers". Co-occurrences of prayers and proximity In the practice of "text mining" it differs between cooccurrence of sentences (lexical units are used together within a sentence) and by proximity (lexical units are relatively close to each other). It is conceivable to find them in relation to larger texts, but in practice they are not taken into consideration due to the high processing capacity of mechanized writing.

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