There was no electronic communication of any sort (electricity was barely understood at the time), and best case transit time was around 6 weeks each way, often 8-12 if possible at all. It was also highly seasonal, and still very dangerous.
So the absolute fastest turn around time was 12 weeks/3 months, and more realistically 4-6 months. With some decent odds that one of the legs of the trip might sink, losing all hands.
It’s why a literal founding father (and one of the most influential ones) was the ambassador. No one else could be trusted.
Technically, a year could also count if you said >> few seconds, but no one will take you seriously if you do either.
And yes “many weeks” easily covers the range of 20 to 30 weeks.
You can search older HN comments and see hundreds upon hundreds of instances of “many weeks” and so on…
Considering he didn’t have any embassy bureaucracy beyond a few staff helping him, and that any reply from washington would be many weeks away… it seems extremely unlikely he would have had much free time at all in Paris.