noun, plural as·si·du·i·ties.
Examples from the Web for assiduity
They did not remotely achieve equality with men, but they won grudging respect and, for their assiduity, they sometimes won power.
He was studious of serving his country to the very last, and the sorrow of the people seemed equal to his assiduity.Pinnock's Improved Edition of Dr. Goldsmith's History of Rome|Oliver Goldsmith
She had supplied herself betimes with a manual of etiquette, which she had studied with the assiduity of a diligent school-girl.The Golden Shoemaker|J. W. Keyworth
The Company, however, worked to the very end with great devotion and assiduity.Addresses on the Revised Version of Holy Scripture|C. J. Ellicott