From MythTV Official Wiki
The keyword table contains a cache of search phrases that have been used to find shows using mythfrontend.
- phrase is the text that was searched for.
- For the ADVANCED search type this field consists of 6 values separated by colons: TITLE:SUBTITLE:DESCRIPTION:PROGRAM TYPE:GENRE:STATION
- searchtype is the type of search that was performed.
- ADVANCED=1, TITLE=2, KEYWORD=3, PEOPLE=4,