'multitude of situations' is correct and usable in written English.
You can use it when referring to a large number of different specific situations. For example, "This program has been designed to help individuals navigate a multitude of situations that they might encounter in their daily lives."
But there are a multitude of situations where my scanning technique isn't up to the job.
"You see a character in a multitude of situations over so many years, and you can't help but think that that is who that guy must be".
But the pervasiveness and intensity of his symptoms suggested that he had crossed the diagnostic Rubicon from a simple occasional shyness to a severe, chronic shyness across a multitude of situations.
The data on the drives, each about the size of a deck of cards, tells the team how to detect nuclear material in a multitude of situations -- when it is underground, or encased in concrete or masked by the presence of natural or manmade background radiation.
Radiofrequency ablation (RFA) has been increasingly used in treating cancer for multitude of situations in various tissue types.
As commonly used, the term "estate sale" covers a multitude of situations, ranging from a sidewalk tag sale to the sale of a deceased person's property or even the auction of a collection belonging to a living person.
A multitude of other situations are possible — but these are the paradigmatic cases.
It's what really makes history intriguing; it's a research experiment where humans are the lab rats...and we can see how our kind reacts in a multitude of given situations.
The previous example comprises a multitude of common situations of sensory dissociations and visuomotor distortions; technology developments have provided new aiming tools to be used in an unusual sensory environment, implementing a novel visuomotor transformation integrating vision and proprioception.
However, the possibility remains that by applying the strategy across the board, our model may thus overestimate the true effect that the institution of a sensible restrictive practice appropriate to a multitude of clinical situations would have.
See related letter by Oremus, http://ccforum.com/content/15/1/404 Normal saline solution has been used for over 50 years in a multitude of clinical situations as an intraoperative, resuscitation and maintenance fluid therapy.
