Doing, n.; pl. Doings (.
Anything done; a deed; an action good or bad; hence, in the plural, conduct; behavior. See Do. To render an account of his doings. Barrow.
Shades of meaning
Fernald has no entry of its own for doing; he lists it under act, transaction, work.
Where he writes about it:
Action is a doing. — from act
One may realize that which he has done nothing to bring about; he may realize the dreams of youth by inheriting a fortune; but he can not effect his early designs except by doing the utmost that is necessary to make them fact. — from do