word choice - "Increase of" versus "increase in"


A. Our system can detect a sudden increase of water levels.


B. Our system can detect a sudden increase in water levels.


Which sentence would you say sounds more natural? Are they both actually correct? Many thanks



Answer



a sudden increase in water levels is the (only) correct one.


You would use of to describe the magnitude of the increase, e.g. an increase of 10 percent.


See more examples here:
http://dictionary.cambridge.org/dictionary/english/increase


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