Usage patterns
〈時〉を前期と後期に分けるto divide (a period) into a first term and a second term
The school year is divided into a first term and a second term.
前期に比べて〈数〉compared to the previous term/period, (some change)
Sales increased 10% compared to the previous period.
前期末に〈事〉at the end of the first term/period, (something happens)
There is an exam at the end of the first term.