ProofreaderAnon here.
Nothing To See Here.
Q has used the phrase 32 times, with several different styles of capitalization and punctuation. I think this is the first time we've seen full title case (even the preposition).
Examples:
Q 1807: "NOTHING TO SEE HERE?" (First appearance, also 2248.)
Q 1919: "Nothing to see here." (Early form, Ntsh.)
Q 1927 "Nothing to See Here." (First appearance of this form; NtSH supplants Ntsh going forward.)
Q 2333: "Nothing to See Here…" (Only occurrence w/ ellipsis…)
Q 2490: "Nothing to See Here" (Only occurrence w/o period)
Q 2552: "Nothing To See Here." (First occurrence of NTSH.)
This is just using browser text search; I might be missing some cases, but I'm pretty sure of the evolution of the form.