It depends on the camera and whether you're shooting wide open or stopped down. In bright sunlight you exposures might be as little as 1/2 or 1/4 second. Unless you're working with very low light, most times exposures won't need to go beyond several seconds unless you're doing pinhole work.
Diluting developer or working with a slower developer helps, as does a yellow filter if your'e using VC paper. I use a 0 Poly Contrast filter that happened to be handy. Filters won't help for graded paper, use a grade 1 paper and/or tame the contrast with the developer.