You could try this website

100 years of baby names - NSW Government Portal

It'll tell you how many babies of a particular name were born in NSW each (for the last few years) or decade back 100 years, as long as there were at least 10 (I think that's how it works)
For example in NSW in 2007 there were 208 Hollys (Ranked #27), Grace had 366 (Rank #15) but no Gracies