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Use "helpfulness" in a sentence
"Sure, you can offer some temporary relief with suggestion but it's not going to have longterm helpfulness that the real deal techniques will give."
"It would be an impervious being who would not note that this outpouring of the spirit of helpfulness is not present in all the dealings between the scattered members of our human family."
"Kindness-under the influence of which a man is said to ‘be kind’ may be defined as helpfulness towards some one in need, not in return for anything, nor for the advantage of the helper himself, but for that of the person helped."