Which preposition to use with thunderstrokes

of Occurrences 2%

Did any of, those German editors hear afar off the thunderstrokes of the Krupp guns which even then were being tested for the war with France and England?

to Occurrences 1%

This discovery was as a thunderstroke to Othello, who now plainly saw that he was no better than a murderer, and that his wife (poor innocent lady) had been ever faithful to him; the extreme anguish of which discovery making life insupportable, he fell upon his sword, and throwing himself upon the body of his dear injured lady, expired.

Which preposition to use with  thunderstrokes