Why is the frog simile an effective image of the Somebody in Dickinson poem?

The frog simile is effective in Dickinson's poem because it captures the dissonance between the external appearance and the inner reality of the "Somebody." Just as a frog croaks to hide its fear or vulnerability, the Somebody maintains a facade of confidence or authority despite feeling insecure or uncertain inside. The simile highlights the complexity of human nature and the masks we wear in social situations.