Why are novella's not novels?
Novella
The novella is generally not as formally experimental as the long story and the novel can be, and it usually lacks the subplots, the multiple points of view, and the generic adaptability that are common in the novel. It is most often concerned with personal and emotional development rather than with the larger social sphere. The novella generally retains something of the unity of impression that is a hallmark of the short story, but it also contains more highly developed characterization and more luxuriant description.
Telenovela
Commonly described using the American colloquialism Spanish soap opera, many telenovelas share some stylistic and thematic similarities to the soap opera familiar to the English-speaking world. The significant difference is their series run length; telenovelas tell one self-contained story, typically within the span of a year or less whereas soap operas tend to have intertwined storylines told during indefinite, continuing runs. This makes them shorter than most other television series, but still much longer than a miniseries. This planned run results in a faster-paced, more concise style of melodrama compared to a typical soap opera. Episodes of telenovelas usually last between 30 and 45 minutes, and rarely more than an hour, except for final episodes. The telenovela combines drama with the 19th-century "feuilleton", and naturally evolved from the Latin American radionovela, according to Blanca de Lizaur.