2. The method of claim 1 , wherein searching the content database to retrieve the one or more content items comprises: determining, based on the frequency analysis, one or more of a featured keyword and a featured key phrase from the preference model; and searching the content database to retrieve the one or more content items that match at least one of the one or more of the featured keyword and the featured key phrase.
2. The method of claim 1 , wherein searching the content database to retrieve the one or more content items comprises: determining, based on the frequency analysis, one or more of a featured keyword and a featured key phrase from the preference model; and searching the content database to retrieve the one or more content items that match at least one of the one or more of the featured keyword and the featured key phrase. 4. The method of claim 2 , wherein the one or more of the featured keyword and the featured key phrase are associated with one or more highest total observation frequencies.