Which preposition to use with clutchings

of Occurrences 5%

Dorn watched the youth's last clutching of empty fingers, the last look of consciousness at his conqueror, the last quiver.

AT Occurrences 4%

THE LAST ACT OF THE DRAMA XXVIII CROCHARD WRITES AN EPILOGUE ILLUSTRATIONS CLUTCHING AT HIS THROAT, HE HALF-TURNED AND FELL "I GRABBED HER AGAIN, AND

after Occurrences 2%

A clutching after something beyond her reach.

Which preposition to use with  clutchings