Terms for subject General containing probability of occurrence

English	Russian
likely probability of the occurrence	высоковероятное возникновение события (vlad-and-slav)
occasional probability of the occurrence	эпизодическое возникновение события (vlad-and-slav)
probability of the occurrence of an event	вероятность события
remote probability of the occurrence	средневероятное возникновение события (vlad-and-slav)
unlikely probability of the occurrence	маловероятное возникновение события (vlad-and-slav)