Hanna BredenbeckCorp numbered and scanned 52,569 index cards from Phyllis Diller's gag file. Prior to this archival effort most estimates for the numbers of cards were in the 40-50,000 range.
Spanning the 1960s to the 1990s roughly. The index was donated in 2003, so there were certainly no
Exact dating on the cards may give a better range, particularly if the text can be searched or if there's a database that can be sorted by date.
Via https://hypothes.is/a/UbW8nERrEe6xjEseEEEy1w we can use the rough dates: 1955-2002 which are the bookends of her career.
This gives us a rough estimate of:<br />
2002-1955 = 48 years (inclusive) or 17,520 days (at 365 days per year ignoring leap years)
52,569/17520 days gives 3.000513698630137 or almost exactly 3 cards (jokes) per day.
Going further if she was getting 12 laughs (jokes) per minute (her record, see: https://hypothes.is/a/MTLukkRpEe635oPT5lr7qg), then if continuously told, it would have taken her 52,569 jokes/12 jokes/minute = 4,380.75 minutes = 73.0125 hours or 3.0421875 days to tell every joke in her file.