The second component is related to the diversity at the graphemic level, and to the complexity of determining the graphemic elements of a word (graphemic parsing), i.e., how to align a phonemic transcription to its spelling counterpart.
orthographic projection | Josephson penetration depth | Depth of field | color depth | Stereoscopic Depth Rendition | Stalin: The First In-depth Biography Based on Explosive New Documents from Russia's Secret Archives | London penetration depth | Dimensionless momentum-depth relationship in open-channel flow | Depth sounding | Depth perception | depth of field (FOV) | Depth hoar | Color depth |