In Latin expressions of time appear in two different cases

In Latin expressions of time appear in two different cases:

1. 
   Duration of time / time how long ACCUSATIVE CASE
   

Agricola septem annos in Britannia mansit.

Agricola stayed in Britain for seven years.

2. 
   Time when ABLATIVE CASE
   

prima luce milites diligenter laborabant.

At dawn the soldiers were working hard.

Words commonly used in these constructions are:

unus one primus first

duo two secundus second

tres three tertius third

quattuor four quartus fourth

quinque five quintus fifth

sex six sextus sixth

septem seven septimus seventh

octo eight octimus eighth

novem nine nonus ninth

decem ten decimus tenth

Give the meaning of the following:

initium

nox

tempus

mensis

dies

annus


Further examples

1. 
   quattuor noctes.
   

2. 
   quinto die.
   

3. 
   secunda hora.
   

4. 
   septem dies.
   

5. 
   totam noctem.
   

6. 
   sex annos.
   

7. 
   decem horas.
   

8. 
   quinta hora Silanus milites in longos ordines instruxit.
   

9. 
   Salvius cum amico colloquium quattuor horas habebat.
   

10. 
    servi tres continuos dies laborabant.
    

11. 
    Quintus quarto die adventum Agricolae nuntiavit.
    

12. 
    sexto die Modestus tam miser erat ut rem diutius ferre non posset.
    

13. 
    Quintus tres menses apud Salvium mansit.
    

14. 
    hoc tempore Romani Britannos superaverunt.
    

15. 
    prima luce Salvius ex oppido effugit.