I'm going to show you page 16 .... should be fairly easy stuff
..then page 36 .... a bit rarer ..
...then page 66 .....
... then page 96 ...less frequently used words
BUT ... not in that order.
Aha ! And your task is ... to work out, using skill and judgement, what the real order is, from the most frequent ( page 16) ..and so on up to page 96 ( least frequent).
So ...here are those 4 pages .... look at the words ... decide in what order the pages were.
... but now, the world-famous Song Selection ....
Who would have thought it !?