at regular intervals
at regular intervals — idiom
1. happening repeatedly with the same length of time between each occurrence.
happening repeatedly with the same length of time between each occurrence.
The bus service runs at regular intervals of twenty minutes throughout the day.
prepositional phrase + of + time noun phrase
Mei-Lin visits her grandmother at regular intervals, usually every two weeks.
at regular intervals with personal schedule
The fire alarm system is tested at regular intervals to keep the building safe.
Tara's blood pressure is checked at regular intervals during her hospital stay.
- periodically
more formal; suggests planned recurrence rather than strictly equal spacing
- at set times
less common but synonymous; emphasises that the times are pre-determined
- every so often
informal; does not require equal gaps — less precise
- at irregular intervals
the direct opposite — gaps of unequal or unpredictable length
- sporadically
happening occasionally without any pattern
文法句型
at regular intervals of [length of time]
用法筆記
Often used with timetables, maintenance schedules, medical checkups, and recurring natural events. The phrase usually appears after a verb describing the repeating action.
常見錯誤
2. placed or arranged so that the distance between each item is the same.
placed or arranged so that the distance between each item is the same.
The streetlights were installed at regular intervals along the main road.
at regular intervals + along [route] for linear spacing
Ahmed planted rose bushes at regular intervals around the edge of the garden.
The artist placed the sculptures at regular intervals throughout the gallery.
The architect designed tall windows at regular intervals across the school's front wall.
- evenly spaced
more common in technical/descriptive writing; directly states the equal distance
- at equal distances
synonymous but slightly more formal
- equidistantly
very formal or technical; rare in everyday speech
- at irregular intervals
items placed without equal spacing
- haphazardly
in a random or disorganised way, with no pattern
文法句型
at regular intervals along/across/around [place]
用法筆記
Commonly describes physical objects placed along a line, path, or boundary. The thing doing the placing (subject) is typically a person or organisation; the placed items are named in the object.