What word shows that their mistreatment has been ongoing? (in the Declaration of Independence)

In the Declaration of Independence, it states that the "History of the present King of Great Britain is a history of repeated injuries and usurparations." This quote indicates that the poor treatment of the Americans by the British government has been occuring over a long period of time.

Jefferson goes on to defend this claim by listing a series of grievances (aka complaints). These complaints have occured over the course of several years, further validating Jefferson's argument.