The phrase "a slippage of" is correct and usable in written English.
It can be used to describe a gradual or unintended change or deviation from a standard or expected state.
Example: "There was a slippage of standards in the quality of the product, leading to customer complaints."
Alternatives: "a deviation of" or "a lapse in".
"I don't know if that was a slippage of the tongue or what.
"There could be a slippage of maybe a couple of weeks," said P. J. Crowley, a Pentagon spokesman.
The absence of a final decision has been reflected in a slippage of the publication date of the counter-terror bill.
"Playing other clubs four times a season is not attractive to most football supporters – as surveys show – and there is a slippage of attendance for many clubs in the Premiership.
The real point of Livingstone's comparison, of course, is not historical accuracy about the past; it's embellishing that past in order to imply a slippage of standards on 'our' side, as compared with 1939-45.
In the Riverdale section of the Bronx, for example, two-bedroom apartments that ranged in monthly rent from $1,400 to $2,800 in 2001 currently range from $1,200 to $2,500, according to one local broker -- a slippage of 14percentt on the low end and 11percentt on the high end.
Full-year profits are expected to be about £74m on revenues of £960m, and the City won't have much patience if there is any indication of a slippage to those numbers.
EADS admitted last month that slow progress in developing the A400M's engines had forced Airbus to postpone deliveries of the plane to European governments by at least six months, "with a risk of a further slippage of up to a half year".
All sequences could be unambiguously aligned (note that the 3-bp insertion in allele 18 of mcyD is TTT, which might be a slippage mutation of the prior TTT sequence).
After intercalation of PA12 into interlayer of OMMT in the initial period of mixing, further dispersion of OMMTs in PA12 matrices is controlled by a slippage process of MMT layers during fabricating PA12 nanocomposites with exfoliated structure.
This represents a slippage rate of 1.97 × 10-2 in barn swallows and 3.02 × 10-2 in tree swallows.
