score:3
A multiple-entry tourist visa allows you to enter and stay for 90 days multiple times, until the visa expires. There is usually a minimum waiting time between exit and re-entry, and that is different from country to country. For example, with a Schengen or Russian visa, you can stay 90 days within a 180-day period from your first entry; see also this visa calculator.
I have found a blog post that claims that there's a 5-day wait period between exit and re-entry for Paraguay, but to be safe, your friend should call the Paraguayan Embassy in Canada to confirm.
Upvote:4
I have visited Paraguay about 5 times in the past two years on my UK passport. EU residents don't need to get a visa ahead of time.
PS it is a beautiful country, amazing sights (esp the largest waterfall in Americas), friendly people and very relaxed pace of life. Low cost of living and lots of business opportunities and growth. Low taxes too. Traffic in Asuncion is a bit crowded and some bus drivers think their are in a Grand Prix so be careful crossing the street!