Using the newly announced Chyron Explorer, you can instantly examine how often the word "impeachment" has been featured in chyrons, as seen below.
It is also clear that BBC has been relatively disinterested in the impeachment proceedings, while MSNBC has emphasized them significantly more than the other two stations.
Unsurprisingly, these numbers are reversed for Brexit, with BBC giving far greater attention to the latest developments over the past two and a half years than the three US-based stations.
The Pope's August 2018 visit to Ireland was also covered much more by BBC given its geographic proximity, with CNN also affording it an elevated amount of chyron coverage.
