4. The video recording/playing device as set forth in claim 1 , wherein the processor: extracts words from the electronic program guide and acquires, as an attention word, a word for which an appearance frequency in a second period, following a first period, has increased beyond the appearance frequency in the first period, displays on a screen, as a search word candidate, a word obtained by causing the acquired attention word to operate on the acquired trending word, and receives a selection input for a search word by the user, and retrieves from the program information database program information that includes the search word selected by the user.
4. The video recording/playing device as set forth in claim 1 , wherein the processor: extracts words from the electronic program guide and acquires, as an attention word, a word for which an appearance frequency in a second period, following a first period, has increased beyond the appearance frequency in the first period, displays on a screen, as a search word candidate, a word obtained by causing the acquired attention word to operate on the acquired trending word, and receives a selection input for a search word by the user, and retrieves from the program information database program information that includes the search word selected by the user. 5. The video recording/playing device as set forth in claim 4 , wherein the processor acquires, as an attention word, from among the words extracted from the electronic program guide, a word having a rate of increase in an appearance frequency over an interval from the first period to the second period, relative to the appearance frequency in the first period, is no less than a specific threshold value, or a specific number of words in which the rate is large.