Hi there! My sentence so far is as follows: "Anticipation washes over him in waves, _____ with peaks of excitement." What I want to say is that he is experiencing anticipation in oscillations: ups and downs. And that during the times where the anticipation is troughing, his excitement peaks. So kind of like two constant waves, where when one is up, the other is down. I have no idea what to put in those blanks to describe this! I'm sure there's an expression out there, but it's just not coming to me. I was thinking perhaps a phrase structurally similar to "in conjunction," but obviously not with that meaning. Any help would be greatly appreciated! I'm getting desperate. T.T Thanks in advance.