Which preposition to use with outstrip

in Occurrences 12%

The quiet Christians who had been modestly and steadfastly travelling Zionward were struck with self-reproach at seeing themselves so suddenly outstripped in their career by this new-made convert.

of Occurrences 1%

[Let it be pleaded for Arthur Miles that his spelling had been outstripped of late by his experience.

Which preposition to use with  outstrip