Daily Chinese Idiom Guessing Game
Very few in number; can be counted on one's fingers.
形容数目很少，扳着手指头就能数过来。
唐·韩愈《忆昨行和张十一》诗自期殒命在春序，屈指数日怜婴孩。”宋·欧阳修《集古录跋尾·唐安公美政颂》今文儒之盛，其屈指可数者，无三四人。非皆不能，盖忽不为尔。”
The number of experts in this field is屈指可数.