Mentions of the phrase "culture war(s)" on CNN, MSNBC and Fox News picked up in September 2017, but really took off in June 2020 and have remained sharply elevated ever since.
MSNBC has mentioned the phrase more than twice as much as CNN and Fox News.
Looking at the total seconds of airtime in which the phrase appeared in the onscreen text of the three channels and adding BBC News London, MSNBC leads by a considerable margin and Fox News is seen to lag substantially. Thus, the term is spoken roughly as much as on CNN, but is displayed in the onscreen text far less.
Worldwide online news mentions begin increasing in late May 2020.