Definition of "intermittently"

The Hariri-Aoun agreement has shown that Hezbollah can bring the national political system to a halt. This happened in the past several years, and it worsened conditions in sectors such as foreign debt, electricity output, rubbish collection, water delivery, and other essential services, to the discomfort of the majority of Lebanese who have spoken out intermittently against the oligarchy of sectarian leaders who rule the country.

2016 October 22, Rami G Khouri, “Lebanese oligarchy preserves its interests once again”, in Aljazeera‎