621987 ÷ 37 
The aim is to understand the frequency of 37 in 621987.

On to step 1:
37 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 37

Let's proceed to step 2:
37 can be fit into 62 1 times, resulting in a remainder of 25.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 25 after subtracting 37 from 62.
Include the next digit (1) from the dividend after 25, then repeat: 251 / 37

Advancing to step 3:
251 divided by 37 is 6 with a remainder of 29.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtract 222 from 251 to get 29.
Grab the next digit (9) from the dividend, add it to 29, then carry on: 299 / 37

On to step 4:
37 goes into 299 8 times with a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 168.0
Deduct 296 from 299 and we're left with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 37

Step 5:
37 goes into 38 1 times with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1681.0
Deduct 37 from 38 and we're left with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 37

On to step 6:
37 can be fit into 17 0 times, resulting in a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 16810.0
Deduct 0 from 17 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
37 goes into 170 4 times with a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 16810.4
Deduct 148 from 170 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 8:
37 can be fit into 220 5 times, resulting in a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 16810.45
Subtract 185 from 220 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 9:
If we divide 350 by 37, we get 9 and a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 16810.459
The remainder is 17 after subtracting 333 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 10:
170 divided by 37 is 4 with a remainder of 22.
Write down 4 as next digit of the result. 
Result so far: 16810.4594
Subtract 148 from 170 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 11:
37 goes into 220 5 times with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 16810.45945
Subtracting 185 from 220 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 12:
When dividing 350 by 37, we get 9 with a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 16810.459459
Subtracting 333 from 350 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 13:
37 can be fit into 170 4 times, resulting in a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 16810.4594594
Subtracting 148 from 170 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 14:
220 divided by 37 is 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 16810.45945945
Subtract 185 from 220 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

In conclusion, the division gives 16810.45945945 with a balance of 3.5e-08.