Like this: A 50-year-old man faces numerous charges for firearms and public mischief after an armed standoff with police at a Swiss Chalet in Toronto's west end on Friday afternoon.
The word Numerous is being used here as short form for "a really large amount", when it really means "beyond number".
The legal system is a precise world. There is an actual number of charges that this man is facing, but the journalists in question realize that the reading public really don't care what this number is. And because writing something like A 50-year-old faces a really large number of charges [...] sounds like you are in grade school, the word "numerous" has been inserted instead.
It is lazy, imprecise use of language.
