first, if youre going to read routines on training calves, forget mike matarazzo - big calves, yes, but the result of intensity and hard training, no. in fact i even read a quote where he said it was solely genetic, and he doesnt train them.
arnold: he said that big calves are largely composed of very dense muscle fibers, and in order to shock these dense fibers into growth, you need to train extremely heavy and consistently, and many sets to hammer them good. in other words, doing what you would do to shock your bis once a month, or even less frequenly, would be what you would do for calves weekly. also, arnold said your calves are naturally holding your body weight (in his case, around 250 lbs + offseason). therefore they are used to handling heavy weights, so that is why extremely heavy weights are need. they will be the hardest, most intense, and probably most stubborn muscle to grow, but it will be well worth it in the end.