Making option for opening windows or frames

I've been exploring how to create new named buffers in new windows and=20
new frames. What are the exact options available for this? For example,=20
one can always open a new window or frame, or alternatively, reuse the=20
same window or frame each time.

I want to define an option variable that determines the display method,=20
whether to open in a new window, a new frame, or reuse the existing=20
window/frame.=20

Could some good option names be suggested for specifying these different=20
display behaviors?