Does the "Time Displacement" property of a wave function have an associated symbol?
Amplitude = $\hat U$
Period = $T$
Ordinary frequency = $f$
Angular frequency = $ω$
Phase = $ϕ$
Time Displacement = ?
The term appears in my college lecture notes:

Does the "Time Displacement" property of a wave function have an associated symbol?
Amplitude = $\hat U$
Period = $T$
Ordinary frequency = $f$
Angular frequency = $ω$
Phase = $ϕ$
Time Displacement = ?
The term appears in my college lecture notes:

For this analogy assume $\alpha > 0$.
The author of that text is simply using the term time displacement to mean the time it would take the lagging function to achieve the same $y$ value (displacement, field magnitude etc.) as the leading function.
In that sense $\Delta t$ is not a bad choice for a symbol. Especially considering that distance displacement is commonly represented by the symbol $\Delta x$.
Physicists use $t$ for time, the variable, units second.