This is the 59th most frequent Icelandic word.
sinni
The Icelandic word "sinni" means "time," "occasion," or "mind/interest," depending on context.
In this sentence, "sinni" is used in its plural form "sinnum" to signify 'times' in the sense of occurrences.
Ég hef farið þangað tvisvar sinnum.
I have been there twice.
Here, "sinni" is used to mean 'time' in the sense of a particular occasion.
Hún gerði það gegn eigin vilja að þessu sinni.
She did it against her will this time.
In this context, "sinni" implies a sense of mind or direction.