had been slotting

• past perfect progressive

  past perfect progressive

  Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.

  of slot.
  slot

  noun

  a narrow, elongated depression, groove, notch, slit, or aperture, especially a narrow opening for receiving or admitting something, as a coin or a letter.

Related Words

• channel
• groove
• hole
• niche
• position
• space
• vacancy