Call it stubbornness, or sheer doggedness; call it what you like.

I underestimated the sheer doggedness of Yellowknife's deputy chief coroner.

John Hultquist, FireEye The Olympics-related attacks are remarkable not for their novelty but for their sheer doggedness.

Sometimes, you get rewarded for sheer doggedness.

But it is the Exeter way, that sheer doggedness overcomes any crudeness, and they suddenly burst into life from a lineout.

Others had it that he had been a lumberjack who, by sheer doggedness, had got possession of the whole lumber forest of the Lake district.