We're dividing 21694735 by 621 
The aim is to understand the frequency of 621 in 21694735.

On to step 1:
If we divide 2 by 621, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 621

Moving on to step 2:
When dividing 21 by 621, we get 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 621

Advancing to step 3:
621 goes into 216 0 times with a remainder of 216.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 216 and we're left with 216.
Append the next digit (9) from the dividend to 216 and continue with: 2169 / 621

Moving on to step 4:
The number 621 fits into 2169 3 times, leaving a remainder of 306.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 1863 from 2169 to get 306.
Fetch the next digit (4) from the dividend, attach it to 306 and continue: 3064 / 621

On to step 5:
621 can be fit into 3064 4 times, resulting in a remainder of 580.
Use 4 as the next digit of our solution. 
Result so far: 34.0
If we subtract 2484 from 3064, we get 580.
Append the next digit (7) from the dividend to 580 and continue with: 5807 / 621

Going ahead to step 6:
When dividing 5807 by 621, we get 9 with a remainder of 218.
Use 9 as the next digit of our solution. 
Result so far: 349.0
If we subtract 5589 from 5807, we get 218.
Grab the next digit (3) from the dividend, add it to 218, then carry on: 2183 / 621

Let's proceed to step 7:
2183 divided by 621 is 3 with a remainder of 320.
The next digit of our result is 3. 
Result so far: 3493.0
If we subtract 1863 from 2183, we get 320.
Bring next digit (5) of the dividend behind the 320 and repeat the process: 3205 / 621

Let's proceed to step 8:
When dividing 3205 by 621, we get 5 with a remainder of 100.
The number 5 becomes the next digit in our result. 
Result so far: 34935.0
The remainder is 100 after subtracting 3105 from 3205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 9:
621 can be fit into 1000 1 times, resulting in a remainder of 379.
Use 1 as the next digit of our solution. 
Result so far: 34935.1
If we take 621 away from 1000, we end up with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Moving on to step 10:
The number 621 fits into 3790 6 times, leaving a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 34935.16
The remainder is 64 after subtracting 3726 from 3790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 11:
621 goes into 640 1 times with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 34935.161
If we subtract 621 from 640, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 12:
When dividing 190 by 621, we get 0 with a remainder of 190.
The number 0 becomes the next digit in our result. 
Result so far: 34935.161
If we take 0 away from 190, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 13:
1900 divided by 621 is 3 with a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 34935.16103
Subtract 1863 from 1900 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 14:
The number 621 fits into 370 0 times, leaving a remainder of 370.
Record the quotient 0 as the next digit in the result. 
Result so far: 34935.16103
If we take 0 away from 370, we end up with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 15:
If we divide 3700 by 621, we get 5 and a remainder of 595.
Write down 5 as next digit of the result. 
Result so far: 34935.1610305
If we take 3105 away from 3700, we end up with 595.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

On to step 16:
621 can be fit into 5950 9 times, resulting in a remainder of 361.
The number 9 becomes the next digit in our result. 
Result so far: 34935.16103059
Deduct 5589 from 5950 and we're left with 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

The final result is 34935.16103059 with a remainder of 3.61e-07.