insert
verb (used with object)
to put or place in.
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Mr. McPherson had been inserting the lenses into glasses that he bought at stores, then selling them through Bay Glass Research, his company at the time.
From New York Times ● Aug. 15, 2015