"Tachograph" Natural Recordings by Native Speakers
A tachograph (or the adjective "tachographic") refers to a device or system for measuring the speed of a vehicle (usually one fitted with an engine of over 10 kW) or other machine, overlaid on a circular chart which records speed against time.
In a vehicle context, a tachograph is a tool for monitoring the driving hours of a driver, and ensures compliance with relevant laws which regulate how many hours may be worked without a rest.
Tachinid (noun): A type of fly that is a parasitoid of other insects, especially flies. Tachinids are parasitoid wasps that lay their eggs inside the bodies of other insects, where their larvae feed on the internal organs of the host before pupating and emerging as adult flies.
A tachogram is a record or graph of heart rate vs. time, typically obtained using an electrocardiogram (ECG) device. It shows the variation in heart rate over a period of time, often used to monitor the heart's rhythm and detect abnormalities.