The general annual incidence of blood clots is 1-2 per 1,000. They are more common than some realise. Out of one million people it would be expected that 19-38 would develop blood clots of some severity or another every week. The majority are non-life threatening and clear up by themselves.
The number of blood clots attributed to the AZ vaccine is insignificant; when compared to the general incidence it’s well within normal and the over-reaction by some nation states is utterly baffling.