Relative incidence refers to the relative frequency of occurrence of a phenomenon compared to a reference group. Synonyms for relative incidence include relative proportion, relative prevalence, relative frequency, and relative occurrence. These terms are used in statistical analysis to describe the relationship between two or more variables. Relative incidence is an important concept in epidemiology where it is often used to compare the incidence of a disease in different populations. It is also used in marketing research to measure the market share of a product compared to its competitors. Other synonyms for relative incidence include relative rate, relative risk, and relative chance.