"large swings" is correct and usable in written English.
You can use it to refer to a wide range of movement or activity. For example, "The stock market has seen large swings in prices this month."
Large swings decided the outcome.
The Gallup poll also has often found implausibly large swings within a race.
The sword fighting is now more medieval style, with large swings and heavy hits.
Their polls, for whatever reason, have often found implausibly large swings in the race.
When there were large swings in the match, it was usually because of error.
Orders for commercial aircraft are volatile from month to month and can cause large swings in the overall figure.
It's not clear what causes such large swings, although Gallup's likely voter model may have something to do with it.
And with less kit to worry about, and no large swings in temperature to deal with, everyone is more relaxed.
Large swings in heart rate can indicate risk, but it is not clear what to do about them.
* Purchasing power through long-term contracts would help utilities and customers lessen the impact of large swings in spot prices.
For weeks, as surveys disagreed with one another and showed large swings in some states, their methodology was questioned.
