'frequently-separated' is a compound word formed from 'frequently' and 'separated'. 'Frequently' originates from Latin 'frequentia', meaning 'crowded' or 'numerous', and 'separated' comes from Latin 'separatus', meaning 'to divide'.

'Frequently' evolved from Middle English 'frequent', while 'separated' evolved from Middle English 'separaten'.

Initially, 'frequently' meant 'crowded', but it evolved to mean 'often'. 'Separated' has maintained its meaning of 'divided'.