'sporadically-offered' originates from the combination of 'sporadic' and 'offered'. 'Sporadic' comes from the Medieval Latin 'sporadicus', meaning 'scattered', and 'offered' is derived from the Old English 'offrian', meaning 'to present'.

'Sporadicus' transformed into the English word 'sporadic', and 'offrian' evolved into 'offer', eventually forming the modern English term 'sporadically-offered'.

Initially, 'sporadic' meant 'scattered or isolated', and 'offered' meant 'to present'. Together, they evolved to mean 'provided at irregular intervals'.