The waiting period before sites appear on GOOGLE varies from a few days to a few months. To speed up this process you are advised to exchange links with other sites and to list your portfolio on site directories.
The more links there are on the net to your portfolio, the more "popular" your portfolio is. The more popular a site is, the quicker it appears in search engine results and the better its ranking becomes.
You should remember that the quality of the links is important : The more popular a site is, the more popular it will make your portfolio.