the time of vs at time of

Some examples from the web:

• He has no alibi for the time of death.
• To establish the time of death.
• Nurse, record the time of death.
• You based the time of Callum's disappearance on her statement.
• Inflicted approximately four hours before the time of death.
• Temperatures about average for the time of year.
• Backtracking from the time of the call.
• We don't have the time of death as that specific yet.
• That's near the time of death.
• Now is the time of reckoning.
• I'm having the time of my life.
• Check out the time of death.
• Check out the time of death.
• That's a law from the time of the inquisition, Ms. Harris.
• Only a madman would rave about the time of oceans.
• So those guys should help narrow down the time of death.
• MLI has the time of death between 11:30 and 12:00.
• And you don't give me the time of day.
• Preliminary forensics report puts the time of death around 6:00 a.m.
• If you count from the time of the arrest.

Some examples from the web:

• All sustained at time of death.
• He was working on dioramas at time of death.
• The victim was bound at time of death.
• Government tox screen indicated he was drunk at time of death.
• Age estimate at time of abandonment, four years.
• Us sharing a celebratory drink is never contingent on my presence at time of arrest.
• All sustained at time of death.
• Melanie Cavanagh, 34 at time of death.
• Okay, 0.2 blood alcohol concentration at time of death.
• Activity detail; position at time of transmission
• GPS on Melinda Perkins' watch places her not in the slaughterhouse at time of death, but approximately 100 meters east.
• A model commercial document should also be prescribed to accompany the raw material during transportation and at time of delivery to the collection centres, tanneries and collagen processing plants.
• Subject was approximately 112 degrees at time of autopsy indicating a temperature increase.
• In your preliminary report, you said the injuries to the temporal and parietal bones and squamosal suture were inflicted at time of death.
• Country of citizenship at time of data collection
• Aid element at time of granting of the loan
• If it does, we can prove he was with him at time of death.
• Now, what's odd is that for someone who appears to have been assaulted at time of death, there are no Colles fractures to the distal radius, or humeral head breaks.
• Imatinib intolerance included patients who discontinued imatinib because of toxicity and were not in major cytogenetic response at time of study entry.
• Plant owner at time of the transaction