giving lessons at pupils' homes; house call teaching
Used for instructors who travel to students' homes to teach, common in traditional arts, music, and tutoring.
The piano teacher is going around to students' homes for house-call lessons.
training at another stable; visiting another sumo stable to train
Sumo term: a wrestler goes to a different stable to practice, often for variety or to train with specific partners.
The young wrestler went to another stable for degeiko and received training from senior wrestlers.
Compound of 出 (de, 'going out') and 稽古 (keiko, 'practice, training'). The sumo sense is a specialized extension of the general meaning.