That is a lot of docs. You just need 6 or 7 sets of docs. We choose 6 sets, going back every 5 months. So we choose Feb21, Jul21, Dec21, May22, Oct22, Mar23. We applied 23 April. And for 2 of the months we could not find anything for my wife so we used a month either side. I added a cover note to each set listing each date and explaining we did not receive any suitable supporting docs for the months in questions, and PDF-ed it all up.