Matching whitespace and non-whitespace characters with RegEx
{1} is redundant, it's better to remove it.
When {2} follows a specific character,
it's is longer to type than the character itself twice,
so I would simply write the character twice.

/\S\S\s\S\S\s\S\S/


As Mike Brant pointed out, some duplication could be reduced by grouping:

/(\S\S\s){2}\S\S/


But this is not as clear as the first example, so I would stick with that.