No, we don't have the most frequent mass shootings

It turns out that not only did the U.S. not have the most frequent mass shootings, it was No. 62 on the list, lower than places like Norway, Finland, and Switzerland. There was also no relationship between the rate of gun ownership in different countries and the rate of mass shootings." 

 https://www.dailysignal.com/2019/02/20/the-us-has-the-most-mass-shootings-and-other-bogus-gun-research/?

What the U.S. does have are journalists who don't do research or ask questions. They have agendas and biases.