Final answer:
The novel 'Pride and Prejudice' does not specify the exact duration of Bingley and Jane's stay at Longbourn after their marriage, although it is implied they moved to their new home shortly thereafter.
Step-by-step explanation:
The question asks about the duration of Bingley and Jane's stay at Longbourn after their marriage in Jane Austen's novel 'Pride and Prejudice'. Unfortunately, the novel does not provide a clear answer to this specific question, as Austen does not mention how long the couple remains at Longbourn post-wedding. The text implies that they did not stay long before setting up their own household, as suggested by Mrs. Bennet's subsequent visits to their new home. Therefore, one can infer that they did not remain at Longbourn for an extended period after their marriage.