We're dividing 69125872 by 423 
The aim is to understand the frequency of 423 in 69125872.

Moving on to step 1:
The number 423 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 423

Advancing to step 2:
423 can be fit into 69 0 times, resulting in a remainder of 69.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 69 to get 69.
Take the next digit (1) from the dividend and append it to 69, then repeat: 691 / 423

Advancing to step 3:
423 goes into 691 1 times with a remainder of 268.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 423 from 691, we get 268.
Append the next digit (2) from the dividend to 268 and continue with: 2682 / 423

On to step 4:
423 can be fit into 2682 6 times, resulting in a remainder of 144.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 2538 from 2682, we get 144.
Include the next digit (5) from the dividend after 144, then repeat: 1445 / 423

Going ahead to step 5:
The number 423 fits into 1445 3 times, leaving a remainder of 176.
Write down 3 as next digit of the result. 
Result so far: 163.0
Subtract 1269 from 1445 to get 176.
Grab the next digit (8) from the dividend, add it to 176, then carry on: 1768 / 423

Moving on to step 6:
If we divide 1768 by 423, we get 4 and a remainder of 76.
The next digit of our result is 4. 
Result so far: 1634.0
The remainder is 76 after subtracting 1692 from 1768.
Take the next digit (7) from the dividend and append it to 76, then repeat: 767 / 423

Going ahead to step 7:
767 divided by 423 is 1 with a remainder of 344.
The next digit of our result is 1. 
Result so far: 16341.0
If we take 423 away from 767, we end up with 344.
Include the next digit (2) from the dividend after 344, then repeat: 3442 / 423

Moving on to step 8:
If we divide 3442 by 423, we get 8 and a remainder of 58.
Record the quotient 8 as the next digit in the result. 
Result so far: 163418.0
If we subtract 3384 from 3442, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 9:
If we divide 580 by 423, we get 1 and a remainder of 157.
The next digit of our result is 1. 
Result so far: 163418.1
Subtract 423 from 580 to get 157.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

Advancing to step 10:
If we divide 1570 by 423, we get 3 and a remainder of 301.
Use 3 as the next digit of our solution. 
Result so far: 163418.13
The remainder is 301 after subtracting 1269 from 1570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Advancing to step 11:
3010 divided by 423 is 7 with a remainder of 49.
Record the quotient 7 as the next digit in the result. 
Result so far: 163418.137
If we take 2961 away from 3010, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 12:
423 can be fit into 490 1 times, resulting in a remainder of 67.
Use 1 as the next digit of our solution. 
Result so far: 163418.1371
Deduct 423 from 490 and we're left with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 13:
The number 423 fits into 670 1 times, leaving a remainder of 247.
Use 1 as the next digit of our solution. 
Result so far: 163418.13711
Subtract 423 from 670 to get 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

After the division, we end up with 163418.13711 and a remainder of 0.000247.