Sentence:  There followed a long and <WSD>sometimes</WSD> bitter discussion of the feasibility of elections for the fall of 1957 , in which it appears that the Minister of the Interior took the most pessimistic view and that the Istiqlal was something less than enthusiastic . 
Meaning of the word marked with <WSD> tags:  on certain occasions or in certain cases but not always; at other times for six months"