Mark,
I think I've overstated my point. You are correct: change in allele frequency over time is part of evolution. However, I think any definition of evolution (in the sense of the theory of evolution) which fails to mention Natural Selection has missed the point.
While you are correct in stating that adaption and Natural Selection are not the only parts of Evolution, they are the only parts which are capable of producing the finely tuned, adaptive and complex organisms we see around us.
If evolution is based on heredity, & the basic unit of that process is the gene, then allele frequency over time is a perfectly valid definition for evolution. Ultimately even macroevolution is explainable with this definition (lots of micro).
Not so. Large scale evolutionary change, particularly adaptive change,
requires a coherent mechanism for change. ToE provides this with Natural Selection. Mere 'change' is no explanation.
Regards,
Mr. Jack