On two occasions, Captain Janeway states that it has been nine months since the events of Scorpion, Part II (1997) and The Gift (1997). In The Omega Directive (1998), Seven previously stated that the same length of time had passed since she joined Voyager's crew. However, Janeway's statement fails to take account of the several weeks covered by Unforgettable (1998) or the month that Voyager spent crossing the Mutara class nebula in One (1998). As such, it has been more than ten months since Seven arrived on Voyager.
The Dauntless covers 15 light years in 30 seconds at slipstream velocity. If Voyager's position in the Delta quadrant is 60,000 light years from Earth, it should only take 33 hours to travel that distance at slipstream velocity, but the Admiral's message states the trip would take three months, and no one in the meeting notices the math error.
In this instance, the Voyager covered fifteen light years in two days in catching up to the Dauntless. Based on that information, it would take Voyager 8000 days (21.9 years) to get home without any changes to the ship, not the larger numbers that have been tossed around in other episodes.
When Captain Janeway discovered the deception that the alien had made she goes to get weapons when it would've been more effective to transport the alien to the brig on Voyager and ask the questions there.
In Astrometrics, Seven of Nine tells Janeway the Borg have not been able to assimilate Arturis' species - " not yet" - but Arturis later claims his whole planet has been assimilated by the Borg.