These two stars are the only iconic heroes/villains i know that got a good TV series, so let's compare.
Freddy - 7 movies
Robocop - 3 movies
Freddy - 1 TV series, 2 seasons, about 40 episodes
Robocop - 1 TV series, 1 season, about 22-23 episodes
Freddy - 2 extra films (Freddy Vs Jason, Freddy Vs Ghostbusters)
Robocop - 4 extra films (Robocop: Prime Directives: Dark Justice, Meltdown, Crach & Burn, Resurrection)
Freddy - 1 upcoming re-imagining/remake
Robocop - 1 upcoming re-imagining/remake
Who's had more screen time? Well they've both had 7 movies, 1 TV series, and 1 upcoming film. But Freddy wins it thanks to his 2 extra films (one being a fan film) & 17-18 TV episodes.
Since this is a comment for the series, between Freddy's Nightmares - ANOES: The Series & Robocop: The Series I would personally choose Robocop...