Final answer:
Ahmed Shah Durrani invaded India for the seventh time between 1759 to 1761, a period that includes the significant Battle of Panipat which happened in January 1761.
Step-by-step explanation:
Ahmed Shah Durrani, also known as Ahmad Shah Abdali, was the founder of the Durrani Empire in Afghanistan and he made several invasions into India during the mid-18th century. The seventh invasion by Ahmed Shah Durrani into India occurred during the period of 1759 to 1761.
This invasion culminated in the Battle of Panipat in January 1761, which was a major confrontation between the invading forces of Durrani and the Maratha Empire. The historical conflict severely impacted the Maratha power and highlighted the weakening grip of the Mughals over India, indirectly setting the stage for a rise in European colonization, such as that by the British East India Company.