"Keep it—do, Miss Everdene—keep it!" said the erratic child of impulse.
To Boldwood women had been remote phenomena rather than necessary complements—comets of such uncertain aspect, movement, and permanence, that whether their orbits were as geometrical, unchangeable, and as subject to laws as his own, or as absolutely erratic as they superficially appeared, he had not deemed it his duty to consider.
Unfortunately the erratic crumb did not improve his narrative powers, and a supplementary hindrance was that of a sneeze, jerking from his pocket his rather large watch, which dangled in front of the young man pendulum-wise.
Her heart erratically flitting hither and thither from perplexed excitement, hot, and almost tearful, she retreated homeward, murmuring, "Oh, what have I done!
There are no more uses of "erratic" in the book.
Show samples from other sources
Bus service was erratic and seemed to go nowhere, but the Federal Government had forced a highway or two through the swamps, thus giving the citizens an opportunity for free egress.
Harper Lee -- Go Set a Watchman
He’d given her an inappropriate, clumsy, but very direct compliment that she knew she would never forget and that had already set her heart to a new and erratic pounding.