> There is a short of a function in the standard Postgres to do the following: > > it is easy to count the number of occurrence of words, but it is rather difficult to count the number of occurrence of phrases. > > For instance: > > A cell of value: 'Hello World' means 1 occurrence a phrase. > > A cell of value: 'Hello World World Hello' means no occurrence of any repeated phrase. > > But, A cell of value: 'Hello World World Hello Hello World' means 2 occurrences of 'Hello World'. > > 'The City of London, London' also has no occurrences of any repeated phrase. > > Anyone has got such a function to check out the number of occurrence of any repeated phrases?
For that to become answerable you may want to define what to do when facing ambiguity.
