Englishfor English speakers
insertion
—
noun
the act of putting one thing into another
—
noun
(= interpolation)
a message (spoken or written) that is introduced or inserted
with the help of his friend's interpolations his story was eventually told
with many insertions in the margins
criterion
Noun
—
A criterion is a principle that you use to judge something or decide about something.
The only criterion used for measuring success was school grades.