Wondering if anyone knows the longest and shortest span between singles [[DIANA YEARS)?

From my research:

41 days between BABY LOVE [[Sept. 17, 1964) and COME SEE ABOUT ME [[Oct. 27, 1964).

and

292 days between BUTTERED POPCORN [[July 21, 1961) and YOUR HEART BELONGS TO ME [[May 8, 1962).