accentology
/ˌaks(ə)nˈtɒlədʒi/Linguistics
noun
A system of accentuation or stress in speech; the study of accentuation.
Origin
Late 19th century; earliest use found in The Academy: a monthly record of literature, learning, science, and art. From accent + -ology, originally after Russian akcentologija (1880 or earlier; probably in turn after German Accentologie).