Which preposition to use with pointlessness

about Occurrences 1%

Neither side was willing to force the issue to trial by arms if it could be helped; and there was a certain pointlessness about the struggle, inasmuch as the differences between the contending parties were really so trifling.

of Occurrences 1%

Had Sheridan fallen into Mrs. Oliphant's mistake, the little shock of surprise which the first-night audience would have felt when the screen was thrown down would have been no compensation at all for the comparative tameness and pointlessness of the preceding passages.

Which preposition to use with  pointlessness