KEYWORDS: describe, trend
(subject) increase + twofold/threefold/etc.
- Can only be used with increases.
- If A is 5, and it increases to 15, can say it increases threefold.
- You can use “a twofold/threefold/etc. increase” in the trend noun structure.
Between 1974 and 1990, the amount of pipeline-transported goods increased threefold.