"accumulated mistakes" is correct and usable in written English.
It can be used to refer to errors that have been made over time and have gradually built up. For example, "The teacher was disappointed by the student's accumulated mistakes on the exam."
Because DNA replication occurs predominantly in dividing cells, microcolonies undergoing DNA replication may accumulate mistakes in DNA replication more rapidly than non-proliferating bacteria.
Perhaps the main reason there is more cancer today is that people live much longer, leaving more time for dividing cells to accumulate genetic mistakes.
The mistakes accumulated, underlining the gap that had opened between the leader and his country's growing urban middle class.
He and Labour have accumulated too many mistakes and behaved too distastefully, some think, like John Major's cabinet in the mid-1990s (though it was the personality of Sir John's complacent party rather than his own that was the main problem then).
Furthermore, increased depth has the unintended side effect of allowing sites with lower susceptibility to systematic error to accumulate multiple such mistakes.
As our children grow up, go to school, make friends and test our limits, we try our damnedest to give them nuggets of wisdom at each step along the way, finding random opportunities to casually share with them some of the knowledge we've accumulated by making horrendous mistakes living a full life.
There is no mistaking the accumulated clutter of decades arranged on the walls and shelves – thousands of books, artefacts from trips to Mexico and New Guinea.
But how can Obama's choice be squared with the accumulating record of mistakes?
The Giants (9-6), their mistakes accumulating like snowdrifts, must beat the Redskins in the season finale, and hope the Packers lose to the Bears, to get in.
If left uncorrected, these mistakes accumulate over time and can eventually harm the cell.
