From looking through Marvel.Wiki, I was able to ascertain this general info. including main relevant info. with few interesting tidbits as well:
In 1967, "Leap-Frog" was introduced in
Daredevil 25 where he's captured and goes on trial in
Daredevil 26 that ends with a failed escape attempt and segues into a story involving a different villain then later appearing in
Daredevil Annual 1 in 1967 as well (
annual served as chance to just put together random mash-up of recent villains selling it as "Emissaries of Evil" including leader Electro, Leap-Frog, Matador, Stiltman, and gladiator). Character not too popular over the years from what I can ascertain reading through info. I was able to find and appearances seem be mainly random in various comics after initial introduction in Daredevil.
In 1982,
Marvel Team-up 121 mashed up Human Torch with Spiderman to take on Speed-Demon. Daredevil's old nemesis sort of re-invented as retired with son assuming his costume calling himself Frogman and passing self off as a comical hero bouncing into Speed Demon and stopping him. His father proud of him but not totally happy Frog-Man not very villain like.
1983
Marvel Team-Up 131 teamup of Spiderman where Frogman meets his arch-nemeses White Rabbit and Walrus.
1992
Spectacular Spiderman 185, the epic re-match nobody has ever heard of as this time both father and son; Leapfrog and Frogman team up with Spiderman to again stop the villainous duo White-Rabbit and Walrus bent on revenge in what appears to be their ultimate showdown.
Edit: Wierdly enough for as little as these character's appeared in the comics over the years while I looked this up, I noticed they actually made action figures of White Rabbit and Frogman. While I don't buy action figures, I suppose there's a few more prominent Marvel icons to add to a collection somewhere.


t:
Further Edit: Nevermind. These appear to be custom action figures I saw while searching (
although who knows a figure may be out there). Still sitting on the bench. Perhaps their time will come even if it is some random person taking things further by showing up at comic con in a custom costume.