it depends on your definition of "polular" if you mean "occurs in a lot of documents" then take a look at the LukeRequestHandler ... if can give you info on terms with high frequencies (and you can use a Shingles based tokenizer to index "phrase" as terms
if by popular you mean "occurs in a lot of queries" there isn't anything in Solr that keeps track of what people search for ... your application would need to do that. : How can i search for popular phrases or words with an : option to include only, for example, technical terms : e.g "Oracle database" rather than common english You'll need a better definition of your goal to get any meaningful answer to the "an option to include only, for example, technical terms" part of that question ... the "for example" implies that there are other examples ... how would you (as a human person) decide when to classify a phrase as a "technical" phrase, vs an ... "other" phrase? if you can't answer that question, then neither can code. -Hoss
