According to Google Keyword tool there is an exact term searched in Spanish approx. 33000 times a month. The specific term has a ~ on it and is made up of two words. Let's called it niños 1234 for illustration purposes.

So the keyword tool indicates that niños 1234 has bout 33k exact searches a month, whereas the version without the ~ roughly 100 searches only.

Both .com domains are free, niños1234.com and ninos1234.com

Which one shall I buy, or would you buy both of them. If you buy the two, which domain would be the live site and which one woud you redirect?

I would be happy to hear your thoughts and strategies for this IDN domain question for a Spanish site.