To solve the expression \(\log_{2} \frac{1}{4} - \log_{3} 1\), we can use the properties of logarithms. The first term, \(\log_{2} \frac{1}{4}\), can be simplified using the property \(\log_{b} \frac{1}{a} = -\log_{b} a\). The second term, \(\log_{3} 1\), is zero because any logarithm of 1 is zero. Therefore, the expression simplifies to \(-\log_{2} 4\).
Step 1: Simplifying the Logarithmic Expression
We start with the expression \( \log_{2} \frac{1}{4} - \log_{3} 1 \). Using the property of logarithms, we can rewrite \( \log_{2} \frac{1}{4} \) as:
\[
\log_{2} \frac{1}{4} = -\log_{2} 4
\]
Since \( \log_{3} 1 = 0 \), the expression simplifies to:
\[
-\log_{2} 4 - 0 = -\log_{2} 4
\]
Step 2: Evaluating \( \log_{2} 4 \)
Next, we evaluate \( \log_{2} 4 \). Since \( 4 = 2^2 \), we have:
\[
\log_{2} 4 = 2
\]
Thus, substituting this back into our expression gives:
\[
-\log_{2} 4 = -2
\]
Final Answer
The final result of the expression \( \log_{2} \frac{1}{4} - \log_{3} 1 \) is:
\[
\boxed{-2}
\]