"President-Elect Biden" Versus "President-Elect Trump" On Television News
The timeline below shows the daily percentage of airtime across CNN, MSNBC and Fox News mentioning "President Elect Trump" after his 2016 election, showing that Fox News used the title the most, followed by CNN and then MSNBC and that it wasn't until December that Fox News' mentions had decreased and MSNBC's mentions increased such that all three were using the term roughly equally.
Contrast that with mentions of "President Elect Biden" thus far. Despite the election being on November 3, television news did not begin to refer to Biden as the president elect until November 7, ramping up through the 8th. Interestingly, beginning on December 1, Fox News has steadily decreased its usage of the term to around half its previous levels, though this could also reflect a simple pivoting away from the election to other stories, much as it did with Trump's 2016 election.