累計

1. Origins, structure, and basic meaning

• Structure: The spelling is 累計, read るいけい, and it combines 累, meaning accumulate, with 計, meaning calculate.
• Basic usage: 累計 is a cumulative total obtained by successively adding values across times or items up to a given point.

2. Common pitfalls and similar expressions

• Accumulation over a period rather than one moment's value
  • Both examples use the form 累計. It refers to the running total of visitors or daily work hours through a stated period, not the value for just one day.
• More than a thousand visitors and a weekend work-time total
  • 今月までの来場者は累計で千人を超えた。 — The cumulative number of visitors through this month exceeded one thousand.
  • 毎日の作業時間を記録し、週末に累計を出す。 — Record the daily work time and calculate the weekly total at the end of the week.