"Son signos de alteración de la deglución el sello labial alterado con emisión de alimento fuera de la cavidad oral, deglución oral fraccionada requiriendo deglutir el bolo en fragmentos, y presencia de residuo faríngeo tras la deglución."
https://seorl.net/PDF/Laringe arbor traqueo-bronquial/120 - ...


"...the percentage of patients with OD (a mixture of ENT diseases, neurodegenerative diseases older people and post-stroke patients) showing post-swallow pharyngeal residue was seen to increase as bolus viscosity increased; likewise, an increase in fractional swallowing was also noted secondary to this residue."
https://link.springer.com/article/10.1007/s00455-016-9696-8

"Impaired efficacy of swallow is identified by the presence of any of the following clinical signs during the test: Oral residue, impaired labial seal, fractional swallow, or pharyngeal residue."
https://www.mdpi.com/2308-3417/4/3/42/htm

https://epos.myesr.org/posterimage/esr/ecr2017/136995/mediag...

It seems to refer to the swallowing of the bolus in stages.

I think you have to look at the whole phrase, "deglución fraccionada en 2 a 3 tiempos", which neither of the previous answers does.