继续 is 21 strokes when printed, but less when foreigners in China like me write them when we handwrite them quickly.

继 is 5 strokes handwritten (纟,䒑,丨,八,乚 each written in one stroke) and 续 is 4 (纟,十over乛,氵,人 each as one stroke), so that's 9 altogether.

Mainland Chinese who learn handwriting at school have a way of writing each character with only one or two strokes.

If you're only counting pen-down-pen up as a single stroke regardless of smooth movement, then any cursive word in any latin-based alphabet is a single stroke, unless it has an 'i/j' or some sort of diacritic in it (some people cross 't' in their cursive, some people do it separately).