Which preposition to use with writhings

of Occurrences 17%

It was admitted by witnesses competent to form an opinion that Westley's contorted face, his troubled breathing, his manner of stepping back, and the curious writhing of his stout arms, all encouraged a supposition that he might be contemplating immediate violence upon the person of Potts.

with Occurrences 1%

She had read in the current novels of the day how hysterically unsophisticated heroines conducted themselves in tight corners and she had followed their writhings with ill-concealed impatience.

Which preposition to use with  writhings