You have not. You claimed eight instances were the words 'supreme court' may have been used but have not presentd quotes or context.
There's no "claim" or "may have been" about it. I have given you the specific location of at least eight different Davis speeches and letters that are explicitly indexed as being on the subject of the Confederat Supreme Court.
That fact in itself contradicts your oft-stated yet wholly gratuitous allegation that Davis abandoned the issue after paying it "lip service" in a single speech.