1820, Washington Irving, "The Early Experiences of Ralph Ringwood" in The Crayon Papers:I grew moody, silent, and unsocial, but studied on doggedly and incessantly.
1906, P. G. Wodehouse, Love Among the Chickens, ch. 6:I continued to pound along doggedly. I was grimly resolute.
1983, Paul Simon, "Train in the Distance":She was married to someone.He was doggedly determined he would get her.
2010 Dec. 9, Ishaan Tharoor, "Obama's Quagmire II: The Economy," Time (retrieved 28 April 2014)Unemployment hovered doggedly near 10%.
