736689 divided by 80 
The aim is to understand the frequency of 80 in 736689.

Let's proceed to step 1:
7 divided by 80 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 80

Going ahead to step 2:
80 goes into 73 0 times with a remainder of 73.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 73 to get 73.
Take the next digit (6) from the dividend and append it to 73, then repeat: 736 / 80

Step 3:
If we divide 736 by 80, we get 9 and a remainder of 16.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 720 from 736 and we're left with 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 80

On to step 4:
If we divide 166 by 80, we get 2 and a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 92.0
Subtract 160 from 166 to get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 80

Let's proceed to step 5:
When dividing 68 by 80, we get 0 with a remainder of 68.
The next digit of our result is 0. 
Result so far: 920.0
If we take 0 away from 68, we end up with 68.
Bring next digit (9) of the dividend behind the 68 and repeat the process: 689 / 80

Step 6:
689 divided by 80 is 8 with a remainder of 49.
Use 8 as the next digit of our solution. 
Result so far: 9208.0
If we subtract 640 from 689, we get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 7:
80 can be fit into 490 6 times, resulting in a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 9208.6
Subtract 480 from 490 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
When dividing 100 by 80, we get 1 with a remainder of 20.
The next digit of our result is 1. 
Result so far: 9208.61
Deduct 80 from 100 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
When dividing 200 by 80, we get 2 with a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 9208.612
Deduct 160 from 200 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
400 divided by 80 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 9208.6125
If we take 400 away from 400, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 9208.6125
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 12:
0 divided by 80 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 9208.6125
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 9208.6125, and the remainder is 0.0.