Final answer:
The duration of free service for popular free subscriptions varies and can be 1 month, 6 months, or 12 months depending on the specific promotional offer. More accurate information would require context regarding the specific service being referred to.
Step-by-step explanation:
The question seems to be asking about the duration of free service provided by a subscription-based online service. However, without more context, it is impossible to provide an accurate answer. Different services, such as streaming platforms, cloud storage providers, or software subscriptions, offer varying lengths of free trials. It is common to see periods like 1 month, 6 months, or even 12 months for promotional offers, but this largely depends on the specific service and the terms of the promotional deal they are offering at the time.
To find the exact duration of a free account or trial with a popular service, you would typically need to visit the service's official website or contact their customer support.