PASADENA, Calif. — Amazon Prime’s original series “The Marvelous Mrs. Maisel” has received warm reviews and scored big at the Emmys and the Golden Globes.

But, as with most streaming shows, no one knows how broadly popular it is.

Now there is some semblance of an answer: fairly popular, at least by the standards of cable television comedies. Also, most of its viewers live on the coasts.

The insights come courtesy of Nielsen, the 96-year-old company that has only recently started tracking streaming viewership. This is the first time it has released numbers for an Amazon series.

The second season of “The Marvelous Mrs. Maisel” averaged 1.9 million viewers during its first seven days on the service, according to Nielsen. The first episode had an average audience of 3.3 million viewers over that week, Nielsen said.