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Which preposition to use with expertise
at Occurrences 1%
Below the high command posts there is a wide range of handymen and specialists who fill particular positions and place their time, energy, experience and expertise at the disposal of the high command.
in Occurrences 1%
Noted for a placid nature, nothing ever seemed to bother him, and his expertise in power systems had never failed the trust which Richard Starlight had placed in him.