Risks with lower probability of occurrence and lower loss are handled in descending order. Because of the infrequent occurrence of rainfall the landscape is arid. They were each formed as a result of an individual structural occurrence. Situationality concerns the factors which make a text relevant to a situation of occurrence. There are described cases of variable median artery occurrence. This has implications for the occurrence of drought conditions. There is no gender predominance for the occurrence of disease. This was seen as a very unusual occurrence. This is an undesirable occurrence in electrical systems. The underlying reason for its occurrence is unclear. It can be used for statistics on the occurrence of chronic diseases. Or, indeed, the occurrence of frequent shipwrecks. There is no consensus on how common this occurrence is. Parasites in fish are a common natural occurrence. This is a common occurrence in emergency departments worldwide.