I don't think there is anything intermittent about it. The only people I have seen with cholangitis have been sicker than snot. I had a lady on the floor for four days with fevers, no RUQ pain, slowly dev jaundice. By the time she had abd pain she was septic and died shortly thereafter. A guy I saw in the ED had Tm 100.2, no RUQ pain, and no gross jaundice with a tot bili of 1.5. He said "I feel a little nauseated but overall pretty good," smiling. 4 hours later in the MICU on three pressors, intubated, saw the ERCP with nasty pus and stones getting burned out of his ampulla, he didn't do so hot.
Fever, RUQ pain, jaundice = death soon, take it seriously!