We look at the division of 42904045 by 691 
The aim is to understand the frequency of 691 in 42904045.

Step 1:
691 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 691

Advancing to step 2:
The number 691 fits into 42 0 times, leaving a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Fetch the next digit (9) from the dividend, attach it to 42 and continue: 429 / 691

On to step 3:
429 divided by 691 is 0 with a remainder of 429.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 429 and we're left with 429.
Fetch the next digit (0) from the dividend, attach it to 429 and continue: 4290 / 691

On to step 4:
691 goes into 4290 6 times with a remainder of 144.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 4146 away from 4290, we end up with 144.
Include the next digit (4) from the dividend after 144, then repeat: 1444 / 691

Moving on to step 5:
691 goes into 1444 2 times with a remainder of 62.
The number 2 becomes the next digit in our result. 
Result so far: 62.0
The remainder is 62 after subtracting 1382 from 1444.
Take the next digit (0) from the dividend and append it to 62, then repeat: 620 / 691

Step 6:
620 divided by 691 is 0 with a remainder of 620.
Put 0 as the next digit of the answer. 
Result so far: 620.0
Deduct 0 from 620 and we're left with 620.
Fetch the next digit (4) from the dividend, attach it to 620 and continue: 6204 / 691

On to step 7:
6204 divided by 691 is 8 with a remainder of 676.
Write down 8 as next digit of the result. 
Result so far: 6208.0
Deduct 5528 from 6204 and we're left with 676.
Include the next digit (5) from the dividend after 676, then repeat: 6765 / 691

Advancing to step 8:
If we divide 6765 by 691, we get 9 and a remainder of 546.
Record the quotient 9 as the next digit in the result. 
Result so far: 62089.0
If we take 6219 away from 6765, we end up with 546.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5460, and continue the process.

Going ahead to step 9:
5460 divided by 691 is 7 with a remainder of 623.
Put 7 as the next digit of the answer. 
Result so far: 62089.7
Subtracting 4837 from 5460 leaves us with 623.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6230, and continue the process.

Moving on to step 10:
691 can be fit into 6230 9 times, resulting in a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 62089.79
Deduct 6219 from 6230 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 11:
691 can be fit into 110 0 times, resulting in a remainder of 110.
Record the quotient 0 as the next digit in the result. 
Result so far: 62089.79
Deduct 0 from 110 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Step 12:
1100 divided by 691 is 1 with a remainder of 409.
Write down 1 as next digit of the result. 
Result so far: 62089.7901
Subtract 691 from 1100 to get 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Moving on to step 13:
When dividing 4090 by 691, we get 5 with a remainder of 635.
Use 5 as the next digit of our solution. 
Result so far: 62089.79015
If we take 3455 away from 4090, we end up with 635.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

Moving on to step 14:
If we divide 6350 by 691, we get 9 and a remainder of 131.
Use 9 as the next digit of our solution. 
Result so far: 62089.790159
Subtracting 6219 from 6350 leaves us with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Moving on to step 15:
1310 divided by 691 is 1 with a remainder of 619.
The number 1 becomes the next digit in our result. 
Result so far: 62089.7901591
If we take 691 away from 1310, we end up with 619.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6190, and continue the process.

Moving on to step 16:
691 goes into 6190 8 times with a remainder of 662.
Use 8 as the next digit of our solution. 
Result so far: 62089.79015918
The remainder is 662 after subtracting 5528 from 6190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6620, and continue the process.

The final result is 62089.79015918 with a remainder of 6.62e-07.