This is perfectly normal behavior for an a/c compressor, the system is designed to maintain a certain pressure and it does this by 'cycling' the compressor on and off which also saves fuel use. The pauses between on/off vary greatly according to the load on the system - big pauses in winter and short ones in summer heavy traffic etc. If a compressor is running continuously then that is an indication of low gas and the compressor scavenging for refrigerant (basically struggling to achieve the required pressure).
The best home-test for an a/c systems health is to check the air temp at the vents with the system set to the lowest temperature, a good indicator is a steady 5 to 8 deg C at the vents.
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2005 S40 T5 SE - Manual. Bilstein B4's. (For Sale)
2010 Citroen C4 1.6 HDi (bizarre Gearbox model).
2010 Renault Twingo (refreshingly simple)
2018 Infiniti Q30 1.6T Business Executive (what's this button do?)
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