unit

"A cognitive structure mastered by a speaker to the point that it can be employed in largely automatic fashion, without requiring attention to its individual parts or their arrangement. A unit is sufficiently well entrenched to be easily evoked as an integrated whole, that is, carried out more or less automatically once initiated. (Such a structure is also said to have unit status.)"

2.1.1

"...it does not demand the constructive effort required for the creation of novel structures..." (p.37)

3.1.1