There are people who like cable news web sites, and search for them on Google.
Let's say for instance that 2/3 of the people who search for news on Google are people who like cable news web sites. Then, by a ratio of almost 2 to 1, cable news web sites will be favored.
Rephrased: Perhaps people are actively consuming CNN through the Google searches on the web, and people are passively consuming Fox through cable.
Not that it's strong evidence, but consider: "According to Nielsen ratings, the median age of Fox’s audience was 66 in 2016." [1] [2]
https://www.cheatsheet.com/entertainment/how-old-is-the-aver...
https://www.adweek.com/tvnewser/heres-the-median-age-of-the-...