As often as Constitutional Amendments are proposed.
Article V (5) established the amendment procedure so the constitution could be modified as necessary.
Checks and Balances
Unwritten
There are many ways in which our constitution has been modified informally since its ratification. In practice the executive branch has grown relatively much stronger, the houses have grown relatively weaker, Congress has ceded its authority to coin money to banking interests, and the federal government involves itself with the affairs of individual citizens, all of which are contrary to the written text of the founding compact.
Justices review the Constitution and use their own personal frames of reference to determine what the Constitution says about something. Because so much is open for interpretation, the justices often disagree on what is meant, and so unanimous decisions are rare.
Article V (5) established the amendment procedure so the constitution could be modified as necessary.
Checks and Balances
Yes, canola oil is often genetically modified.
Yes, any law can be repealed or modified by another law, and any part of the Constitution can be repealed or modified by another Constitutional Amendment except those that specifically say they can't be.
Constitution
The name for a humanly modified object in archaeology is an artifact (also spelt artefact).
Unwritten
A genetically modified salmon is made when you melt down faom shrimp and pour into a rubber mould. I do this often. PS LILY SMELLs
Kites are often shaped like diamonds, or modified diamond shapes.
modified underground stem
Kites are often shaped like diamonds, or modified diamond shapes.
How often a database should be backed up depends on how often its contents is modified and how important the contents is. A frequently modified database containing business critical information might be backed up several times a day. On the other hand, a database that is rarely modified, but is used for reference, might be backed up once a week or even once a month.