How long have Focus Group and Neighbour Group people been in contact overall?

At least since the inception of Tok Pisin, and probably before that.

What is the overall time frame when the largest number of people had the most opportunities for interaction?

The present day.

How long have Focus Group and Neighbour Group peoples been forming families with each other for?

Definitely for several decades now, but I'm not quite certain when this started. I assume that it is closely related to the increase in mobility due to people relocating for education and work since WWII. There may have been a small amount of intermarriage with other Manus groups before that, but likely not much given that this is not culturally prescribed and preference is still to marry within the Paluai-speaking community.

What’s the time frame of densest contact between Focus Group and Neighbour Group as far as family formation is concerned?

The present day.

How long have Focus Group and Neighbour Group people been involved in the knowledge domain together for?

Since the time missionaries and church leaders (e.g. clergymen in the Catholic church) from elsewhere in PNG or overseas have been interacting with the Paluai speech community, so most likely since the early 20th century.

What is the time frame when the largest number of people had the most opportunities for interaction in the knowledge domain?

Probably since the early 20th century, until the present day and continuing. Interaction will have been increasing during this time frame and likely be densest in the present day.

How long have Focus Group people and Neighbour Group people worked together for?

For about 50-60 years. Increase in tertiary education and Paluai speakers moving to other parts of PNG for work took off in earnest after WWII.

What is the time frame when the largest number of people had the most opportunities for interaction in the labour domain?

The present day.

How long have Focus Group and Neighbour Group people been in contact in the local community?

Since about 50 years.

What is the time frame when the largest number of people had the most opportunities for interaction in the local community?

In the present day.

How long have Focus Group and Neighbour Group people traded for?

Since the early 20th century (most likely for longer than that, but using a receptive multilingual mode of communication before the inception of Tok Pisin).

What is the time frame when the largest number of people had the most opportunities for interaction in trade?

The present day.