There are no hard rules as to how many prints or digital files a model gets from a shoot.
Think quality not quantity! Ten or twenty strong photographs in a portfolio are better than fifty mediocre ones. See also how many photos and what kind.
Choose a photographer who offers to put together a carefully edited selection of the best photographs from the shoot. Photographic work should not know the term "quick, cheap and dirty". A photographer should take pride in all his work and put the same amount of effort, time and care into personal work as into commissions.
Other benefits for models
The photographs are, of course, your fee. You may also look upon the actual amount of money saved compared to the cost of hiring a photographer as your fee.
It does happen that a photographer re-calls you for paid work if you are very talented or simply have the right look for a particular job.
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A number of models have gained agency representation and modelling jobs on the strength of my photographs - I imagine this will be similar with other photographers.
