17. A non-transitory computer readable storage medium comprising instructions that, when executed by one or more processors, cause the one or more processors to perform operations including: receiving video content using an inactive tuner of a television receiver; obtaining text data corresponding to an audio portion of the video content; evaluating the text data to identify frequencies of words appearing in the text data; receiving input corresponding to determination of one or more user-designated keywords; storing the one or more user-designated keywords to a word list, wherein the word list includes at least a first keyword; determining that the first keyword appears in the text data with a first frequency greater than a first threshold frequency; and generating a first interface for display on a display device in real-time upon determining that the first frequency is greater than the first threshold frequency, wherein the first interface includes a notification identifying a match of the first keyword.
17. A non-transitory computer readable storage medium comprising instructions that, when executed by one or more processors, cause the one or more processors to perform operations including: receiving video content using an inactive tuner of a television receiver; obtaining text data corresponding to an audio portion of the video content; evaluating the text data to identify frequencies of words appearing in the text data; receiving input corresponding to determination of one or more user-designated keywords; storing the one or more user-designated keywords to a word list, wherein the word list includes at least a first keyword; determining that the first keyword appears in the text data with a first frequency greater than a first threshold frequency; and generating a first interface for display on a display device in real-time upon determining that the first frequency is greater than the first threshold frequency, wherein the first interface includes a notification identifying a match of the first keyword. 18. The non-transitory computer readable storage medium of claim 17 , wherein the television receiver includes a plurality of tuners, and wherein the inactive tuner corresponds to one of the plurality of tuners that is not being actively used to display live video content on the display device or that is not being actively used to record video content according to a recording schedule or timer.