The credit requests will show up, but will not affect your credit score for the "shopping" period. Based on this from myfico, it looks like the interval might be 14, 30, or 45 days dependent on the scoring algorithm used by the lender.
Does the formula treat all credit inquiries the same?
No. Research has
indicated that the FICO score is more predictive when it treats loans
that commonly involve rate-shopping, such as mortgage, auto and
student loans, in a different way. For these types of loans, the FICO
score ignores inquiries made in the 30 days prior to scoring. So, if
you find a loan within 30 days, the inquiries won't affect your score
while you're rate shopping. In addition, the score looks on your
credit report for rate-shopping inquiries older than 30 days. If it
finds some, it counts those inquiries that fall in a typical shopping
period as just one inquiry when determining your score. For FICO
scores calculated from older versions of the scoring formula, this
shopping period is any 14 day span. For FICO scores calculated from
the newest versions of the scoring formula, this shopping period is
any 45 day span. Each lender chooses which version of the FICO scoring
formula it wants the credit reporting agency to use to calculate your
FICO score.
Source: http://www.myfico.com/crediteducation/creditchecks/inquiries.aspx