Sentence:  It was cheaper to build both railways and suburbs to the south, and <WSD>commuting</WSD> - which Charles Pearson called 'oscillating' - began between the village of Greenwich and London Bridge. {The term <WSD>'commuting</WSD>' is from America, and did not become established in Britain until the 1940s). 
Meaning of the word marked with <WSD> tags:  travel between home and workplace