In the Least Frequently Used (LFU) page replacement algorithm, the page with the least visits in a given period of time

[correctanswer]

In the Least Frequently Used (LFU) page replacement algorithm,
the page with the least visits in a given period of time is
removed. If the frequency of pages remains constant, the page that
comes first is replaced first. For the following page reference
string, how many page faults would occur using the LFU algorithm
for the case of Three Frames. ABCDABEABCDEBABCBADA Remember all
frames are initially empty, so your first page in all cases will
cost one fault each.