The phrase "multitude of options" is correct and can be used in written English. You can use this phrase when referring to a large amount of different choices or alternatives. For example, "When shopping online, I was presented with a multitude of options to choose from.".
Beyond the pale, there is a multitude of options.
With Mr. Lee's departure, Mr. Soong has emerged as a man with a multitude of options.
"It shows both the attitude of New Yorkers toward healthy living and the multitude of options.
Petke and the Red Bulls now have a multitude of options, both up top and in the midfield.
Though cereal is certainly appealing for its quick and easy preparation, sorting through the multitudes of options at grocery aisles can be a tricky task if you're looking for something healthy.
This year, it's The Empire Strikes Back for four whole months, a draw for many but - given the multitude of alternative cinema options that have emerged since Secret Cinema launched in 2007 - a choice that seems like standard screening fodder.
There are a multitude of good options; James's challenge is to find the great one.
I love the desktop app, it’s always running on my Mac. Ludwig is the best English buddy, it answers my 100 queries per day and stays cool.
Cristina Valenza
Retail Lead Linguist @ Apple Inc.